1de57606cSSage Weil #ifndef _FS_CEPH_SUPER_H 2de57606cSSage Weil #define _FS_CEPH_SUPER_H 3de57606cSSage Weil 43d14c5d2SYehuda Sadeh #include <linux/ceph/ceph_debug.h> 5de57606cSSage Weil 6de57606cSSage Weil #include <asm/unaligned.h> 7de57606cSSage Weil #include <linux/backing-dev.h> 8de57606cSSage Weil #include <linux/completion.h> 9de57606cSSage Weil #include <linux/exportfs.h> 10de57606cSSage Weil #include <linux/fs.h> 11de57606cSSage Weil #include <linux/mempool.h> 12de57606cSSage Weil #include <linux/pagemap.h> 13de57606cSSage Weil #include <linux/wait.h> 14f1a3d572SStephen Rothwell #include <linux/writeback.h> 155a0e3ad6STejun Heo #include <linux/slab.h> 16de57606cSSage Weil 173d14c5d2SYehuda Sadeh #include <linux/ceph/libceph.h> 18de57606cSSage Weil 19de57606cSSage Weil /* f_type in struct statfs */ 20de57606cSSage Weil #define CEPH_SUPER_MAGIC 0x00c36400 21de57606cSSage Weil 22de57606cSSage Weil /* large granularity for statfs utilization stats to facilitate 23de57606cSSage Weil * large volume sizes on 32-bit machines. */ 24de57606cSSage Weil #define CEPH_BLOCK_SHIFT 20 /* 1 MB */ 25de57606cSSage Weil #define CEPH_BLOCK (1 << CEPH_BLOCK_SHIFT) 26de57606cSSage Weil 273d14c5d2SYehuda Sadeh #define CEPH_MOUNT_OPT_DIRSTAT (1<<4) /* `cat dirname` for stats */ 283d14c5d2SYehuda Sadeh #define CEPH_MOUNT_OPT_RBYTES (1<<5) /* dir st_bytes = rbytes */ 293d14c5d2SYehuda Sadeh #define CEPH_MOUNT_OPT_NOASYNCREADDIR (1<<7) /* no dcache readdir */ 30ad1fee96SYehuda Sadeh #define CEPH_MOUNT_OPT_INO32 (1<<8) /* 32 bit inos */ 316a259382SSage Weil 323d14c5d2SYehuda Sadeh #define CEPH_MOUNT_OPT_DEFAULT (CEPH_MOUNT_OPT_RBYTES) 33de57606cSSage Weil 343d14c5d2SYehuda Sadeh #define ceph_set_mount_opt(fsc, opt) \ 353d14c5d2SYehuda Sadeh (fsc)->mount_options->flags |= CEPH_MOUNT_OPT_##opt; 363d14c5d2SYehuda Sadeh #define ceph_test_mount_opt(fsc, opt) \ 373d14c5d2SYehuda Sadeh (!!((fsc)->mount_options->flags & CEPH_MOUNT_OPT_##opt)) 38de57606cSSage Weil 3980456f86SSage Weil #define CEPH_RSIZE_DEFAULT (512*1024) /* readahead */ 403d14c5d2SYehuda Sadeh #define CEPH_MAX_READDIR_DEFAULT 1024 413d14c5d2SYehuda Sadeh #define CEPH_MAX_READDIR_BYTES_DEFAULT (512*1024) 423d14c5d2SYehuda Sadeh #define CEPH_SNAPDIRNAME_DEFAULT ".snap" 43de57606cSSage Weil 443d14c5d2SYehuda Sadeh struct ceph_mount_options { 45de57606cSSage Weil int flags; 463d14c5d2SYehuda Sadeh int sb_flags; 473d14c5d2SYehuda Sadeh 486e19a16eSSage Weil int wsize; 496e19a16eSSage Weil int rsize; /* max readahead */ 506e19a16eSSage Weil int congestion_kb; /* max writeback in flight */ 516e19a16eSSage Weil int caps_wanted_delay_min, caps_wanted_delay_max; 526e19a16eSSage Weil int cap_release_safety; 5323804d91SSage Weil int max_readdir; /* max readdir result (entires) */ 5423804d91SSage Weil int max_readdir_bytes; /* max readdir result (bytes) */ 553d14c5d2SYehuda Sadeh 563d14c5d2SYehuda Sadeh /* 573d14c5d2SYehuda Sadeh * everything above this point can be memcmp'd; everything below 583d14c5d2SYehuda Sadeh * is handled in compare_mount_options() 593d14c5d2SYehuda Sadeh */ 603d14c5d2SYehuda Sadeh 61de57606cSSage Weil char *snapdir_name; /* default ".snap" */ 62de57606cSSage Weil }; 63de57606cSSage Weil 643d14c5d2SYehuda Sadeh struct ceph_fs_client { 65de57606cSSage Weil struct super_block *sb; 66de57606cSSage Weil 673d14c5d2SYehuda Sadeh struct ceph_mount_options *mount_options; 683d14c5d2SYehuda Sadeh struct ceph_client *client; 693d14c5d2SYehuda Sadeh 70de57606cSSage Weil unsigned long mount_state; 7185ccce43SSage Weil int min_caps; /* min caps i added */ 7285ccce43SSage Weil 733d14c5d2SYehuda Sadeh struct ceph_mds_client *mdsc; 74de57606cSSage Weil 75de57606cSSage Weil /* writeback */ 76de57606cSSage Weil mempool_t *wb_pagevec_pool; 77de57606cSSage Weil struct workqueue_struct *wb_wq; 78de57606cSSage Weil struct workqueue_struct *pg_inv_wq; 79de57606cSSage Weil struct workqueue_struct *trunc_wq; 802baba250SYehuda Sadeh atomic_long_t writeback_count; 81de57606cSSage Weil 82de57606cSSage Weil struct backing_dev_info backing_dev_info; 830743304dSSage Weil 840743304dSSage Weil #ifdef CONFIG_DEBUG_FS 853d14c5d2SYehuda Sadeh struct dentry *debugfs_dentry_lru, *debugfs_caps; 862baba250SYehuda Sadeh struct dentry *debugfs_congestion_kb; 8706edf046SSage Weil struct dentry *debugfs_bdi; 883d14c5d2SYehuda Sadeh struct dentry *debugfs_mdsc, *debugfs_mdsmap; 890743304dSSage Weil #endif 90de57606cSSage Weil }; 91de57606cSSage Weil 923d14c5d2SYehuda Sadeh 93de57606cSSage Weil /* 94de57606cSSage Weil * File i/o capability. This tracks shared state with the metadata 95de57606cSSage Weil * server that allows us to cache or writeback attributes or to read 96de57606cSSage Weil * and write data. For any given inode, we should have one or more 97de57606cSSage Weil * capabilities, one issued by each metadata server, and our 98de57606cSSage Weil * cumulative access is the OR of all issued capabilities. 99de57606cSSage Weil * 100de57606cSSage Weil * Each cap is referenced by the inode's i_caps rbtree and by per-mds 101de57606cSSage Weil * session capability lists. 102de57606cSSage Weil */ 103de57606cSSage Weil struct ceph_cap { 104de57606cSSage Weil struct ceph_inode_info *ci; 105de57606cSSage Weil struct rb_node ci_node; /* per-ci cap tree */ 106de57606cSSage Weil struct ceph_mds_session *session; 107de57606cSSage Weil struct list_head session_caps; /* per-session caplist */ 108de57606cSSage Weil int mds; 109de57606cSSage Weil u64 cap_id; /* unique cap id (mds provided) */ 110de57606cSSage Weil int issued; /* latest, from the mds */ 111de57606cSSage Weil int implemented; /* implemented superset of issued (for revocation) */ 112de57606cSSage Weil int mds_wanted; 113685f9a5dSSage Weil u32 seq, issue_seq, mseq; 114685f9a5dSSage Weil u32 cap_gen; /* active/stale cycle */ 115de57606cSSage Weil unsigned long last_used; 116de57606cSSage Weil struct list_head caps_item; 117de57606cSSage Weil }; 118de57606cSSage Weil 119de57606cSSage Weil #define CHECK_CAPS_NODELAY 1 /* do not delay any further */ 120de57606cSSage Weil #define CHECK_CAPS_AUTHONLY 2 /* only check auth cap */ 121de57606cSSage Weil #define CHECK_CAPS_FLUSH 4 /* flush any dirty caps */ 122de57606cSSage Weil 123de57606cSSage Weil /* 124de57606cSSage Weil * Snapped cap state that is pending flush to mds. When a snapshot occurs, 125de57606cSSage Weil * we first complete any in-process sync writes and writeback any dirty 126de57606cSSage Weil * data before flushing the snapped state (tracked here) back to the MDS. 127de57606cSSage Weil */ 128de57606cSSage Weil struct ceph_cap_snap { 129de57606cSSage Weil atomic_t nref; 130de57606cSSage Weil struct ceph_inode_info *ci; 131de57606cSSage Weil struct list_head ci_item, flushing_item; 132de57606cSSage Weil 133de57606cSSage Weil u64 follows, flush_tid; 134de57606cSSage Weil int issued, dirty; 135de57606cSSage Weil struct ceph_snap_context *context; 136de57606cSSage Weil 137de57606cSSage Weil mode_t mode; 138de57606cSSage Weil uid_t uid; 139de57606cSSage Weil gid_t gid; 140de57606cSSage Weil 1414a625be4SSage Weil struct ceph_buffer *xattr_blob; 142de57606cSSage Weil u64 xattr_version; 143de57606cSSage Weil 144de57606cSSage Weil u64 size; 145de57606cSSage Weil struct timespec mtime, atime, ctime; 146de57606cSSage Weil u64 time_warp_seq; 147de57606cSSage Weil int writing; /* a sync write is still in progress */ 148de57606cSSage Weil int dirty_pages; /* dirty pages awaiting writeback */ 149de57606cSSage Weil }; 150de57606cSSage Weil 151de57606cSSage Weil static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap) 152de57606cSSage Weil { 1534a625be4SSage Weil if (atomic_dec_and_test(&capsnap->nref)) { 1544a625be4SSage Weil if (capsnap->xattr_blob) 1554a625be4SSage Weil ceph_buffer_put(capsnap->xattr_blob); 156de57606cSSage Weil kfree(capsnap); 157de57606cSSage Weil } 1584a625be4SSage Weil } 159de57606cSSage Weil 160de57606cSSage Weil /* 161de57606cSSage Weil * The frag tree describes how a directory is fragmented, potentially across 162de57606cSSage Weil * multiple metadata servers. It is also used to indicate points where 163de57606cSSage Weil * metadata authority is delegated, and whether/where metadata is replicated. 164de57606cSSage Weil * 165de57606cSSage Weil * A _leaf_ frag will be present in the i_fragtree IFF there is 166de57606cSSage Weil * delegation info. That is, if mds >= 0 || ndist > 0. 167de57606cSSage Weil */ 168de57606cSSage Weil #define CEPH_MAX_DIRFRAG_REP 4 169de57606cSSage Weil 170de57606cSSage Weil struct ceph_inode_frag { 171de57606cSSage Weil struct rb_node node; 172de57606cSSage Weil 173de57606cSSage Weil /* fragtree state */ 174de57606cSSage Weil u32 frag; 175de57606cSSage Weil int split_by; /* i.e. 2^(split_by) children */ 176de57606cSSage Weil 177de57606cSSage Weil /* delegation and replication info */ 178de57606cSSage Weil int mds; /* -1 if same authority as parent */ 179de57606cSSage Weil int ndist; /* >0 if replicated */ 180de57606cSSage Weil int dist[CEPH_MAX_DIRFRAG_REP]; 181de57606cSSage Weil }; 182de57606cSSage Weil 183de57606cSSage Weil /* 184de57606cSSage Weil * We cache inode xattrs as an encoded blob until they are first used, 185de57606cSSage Weil * at which point we parse them into an rbtree. 186de57606cSSage Weil */ 187de57606cSSage Weil struct ceph_inode_xattr { 188de57606cSSage Weil struct rb_node node; 189de57606cSSage Weil 190de57606cSSage Weil const char *name; 191de57606cSSage Weil int name_len; 192de57606cSSage Weil const char *val; 193de57606cSSage Weil int val_len; 194de57606cSSage Weil int dirty; 195de57606cSSage Weil 196de57606cSSage Weil int should_free_name; 197de57606cSSage Weil int should_free_val; 198de57606cSSage Weil }; 199de57606cSSage Weil 2003d14c5d2SYehuda Sadeh /* 2013d14c5d2SYehuda Sadeh * Ceph dentry state 2023d14c5d2SYehuda Sadeh */ 2033d14c5d2SYehuda Sadeh struct ceph_dentry_info { 2043d14c5d2SYehuda Sadeh struct ceph_mds_session *lease_session; 2053d14c5d2SYehuda Sadeh u32 lease_gen, lease_shared_gen; 2063d14c5d2SYehuda Sadeh u32 lease_seq; 2073d14c5d2SYehuda Sadeh unsigned long lease_renew_after, lease_renew_from; 2083d14c5d2SYehuda Sadeh struct list_head lru; 2093d14c5d2SYehuda Sadeh struct dentry *dentry; 2103d14c5d2SYehuda Sadeh u64 time; 2113d14c5d2SYehuda Sadeh u64 offset; 2123d14c5d2SYehuda Sadeh }; 2133d14c5d2SYehuda Sadeh 214de57606cSSage Weil struct ceph_inode_xattrs_info { 215de57606cSSage Weil /* 216de57606cSSage Weil * (still encoded) xattr blob. we avoid the overhead of parsing 217de57606cSSage Weil * this until someone actually calls getxattr, etc. 218de57606cSSage Weil * 219de57606cSSage Weil * blob->vec.iov_len == 4 implies there are no xattrs; blob == 220de57606cSSage Weil * NULL means we don't know. 221de57606cSSage Weil */ 222de57606cSSage Weil struct ceph_buffer *blob, *prealloc_blob; 223de57606cSSage Weil 224de57606cSSage Weil struct rb_root index; 225de57606cSSage Weil bool dirty; 226de57606cSSage Weil int count; 227de57606cSSage Weil int names_size; 228de57606cSSage Weil int vals_size; 229de57606cSSage Weil u64 version, index_version; 230de57606cSSage Weil }; 231de57606cSSage Weil 232de57606cSSage Weil /* 233de57606cSSage Weil * Ceph inode. 234de57606cSSage Weil */ 235de57606cSSage Weil struct ceph_inode_info { 236de57606cSSage Weil struct ceph_vino i_vino; /* ceph ino + snap */ 237de57606cSSage Weil 238de57606cSSage Weil u64 i_version; 239de57606cSSage Weil u32 i_time_warp_seq; 240de57606cSSage Weil 241de57606cSSage Weil unsigned i_ceph_flags; 242de57606cSSage Weil unsigned long i_release_count; 243de57606cSSage Weil 2446c0f3af7SSage Weil struct ceph_dir_layout i_dir_layout; 245de57606cSSage Weil struct ceph_file_layout i_layout; 246de57606cSSage Weil char *i_symlink; 247de57606cSSage Weil 248de57606cSSage Weil /* for dirs */ 249de57606cSSage Weil struct timespec i_rctime; 250de57606cSSage Weil u64 i_rbytes, i_rfiles, i_rsubdirs; 251de57606cSSage Weil u64 i_files, i_subdirs; 252de57606cSSage Weil u64 i_max_offset; /* largest readdir offset, set with I_COMPLETE */ 253de57606cSSage Weil 254de57606cSSage Weil struct rb_root i_fragtree; 255de57606cSSage Weil struct mutex i_fragtree_mutex; 256de57606cSSage Weil 257de57606cSSage Weil struct ceph_inode_xattrs_info i_xattrs; 258de57606cSSage Weil 259de57606cSSage Weil /* capabilities. protected _both_ by i_lock and cap->session's 260de57606cSSage Weil * s_mutex. */ 261de57606cSSage Weil struct rb_root i_caps; /* cap list */ 262de57606cSSage Weil struct ceph_cap *i_auth_cap; /* authoritative cap, if any */ 263de57606cSSage Weil unsigned i_dirty_caps, i_flushing_caps; /* mask of dirtied fields */ 264de57606cSSage Weil struct list_head i_dirty_item, i_flushing_item; 265de57606cSSage Weil u64 i_cap_flush_seq; 266de57606cSSage Weil /* we need to track cap writeback on a per-cap-bit basis, to allow 267de57606cSSage Weil * overlapping, pipelined cap flushes to the mds. we can probably 268de57606cSSage Weil * reduce the tid to 8 bits if we're concerned about inode size. */ 269de57606cSSage Weil u16 i_cap_flush_last_tid, i_cap_flush_tid[CEPH_CAP_BITS]; 270de57606cSSage Weil wait_queue_head_t i_cap_wq; /* threads waiting on a capability */ 271de57606cSSage Weil unsigned long i_hold_caps_min; /* jiffies */ 272de57606cSSage Weil unsigned long i_hold_caps_max; /* jiffies */ 273de57606cSSage Weil struct list_head i_cap_delay_list; /* for delayed cap release to mds */ 274de57606cSSage Weil int i_cap_exporting_mds; /* to handle cap migration between */ 275de57606cSSage Weil unsigned i_cap_exporting_mseq; /* mds's. */ 276de57606cSSage Weil unsigned i_cap_exporting_issued; 277de57606cSSage Weil struct ceph_cap_reservation i_cap_migration_resv; 278de57606cSSage Weil struct list_head i_cap_snaps; /* snapped state pending flush to mds */ 2797d8cb26dSSage Weil struct ceph_snap_context *i_head_snapc; /* set if wr_buffer_head > 0 or 2807d8cb26dSSage Weil dirty|flushing caps */ 281de57606cSSage Weil unsigned i_snap_caps; /* cap bits for snapped files */ 282de57606cSSage Weil 283de57606cSSage Weil int i_nr_by_mode[CEPH_FILE_MODE_NUM]; /* open file counts */ 284de57606cSSage Weil 285de57606cSSage Weil u32 i_truncate_seq; /* last truncate to smaller size */ 286de57606cSSage Weil u64 i_truncate_size; /* and the size we last truncated down to */ 287de57606cSSage Weil int i_truncate_pending; /* still need to call vmtruncate */ 288de57606cSSage Weil 289de57606cSSage Weil u64 i_max_size; /* max file size authorized by mds */ 290de57606cSSage Weil u64 i_reported_size; /* (max_)size reported to or requested of mds */ 291de57606cSSage Weil u64 i_wanted_max_size; /* offset we'd like to write too */ 292de57606cSSage Weil u64 i_requested_max_size; /* max_size we've requested */ 293de57606cSSage Weil 294de57606cSSage Weil /* held references to caps */ 295de57606cSSage Weil int i_pin_ref; 296d3d0720dSHenry C Chang int i_rd_ref, i_rdcache_ref, i_wr_ref, i_wb_ref; 297de57606cSSage Weil int i_wrbuffer_ref, i_wrbuffer_ref_head; 298de57606cSSage Weil u32 i_shared_gen; /* increment each time we get FILE_SHARED */ 299cd045cb4SSage Weil u32 i_rdcache_gen; /* incremented each time we get FILE_CACHE. */ 300de57606cSSage Weil u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */ 301de57606cSSage Weil 302de57606cSSage Weil struct list_head i_unsafe_writes; /* uncommitted sync writes */ 303de57606cSSage Weil struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */ 304de57606cSSage Weil spinlock_t i_unsafe_lock; 305de57606cSSage Weil 306de57606cSSage Weil struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */ 307de57606cSSage Weil int i_snap_realm_counter; /* snap realm (if caps) */ 308de57606cSSage Weil struct list_head i_snap_realm_item; 309de57606cSSage Weil struct list_head i_snap_flush_item; 310de57606cSSage Weil 311de57606cSSage Weil struct work_struct i_wb_work; /* writeback work */ 312de57606cSSage Weil struct work_struct i_pg_inv_work; /* page invalidation work */ 313de57606cSSage Weil 314de57606cSSage Weil struct work_struct i_vmtruncate_work; 315de57606cSSage Weil 316de57606cSSage Weil struct inode vfs_inode; /* at end */ 317de57606cSSage Weil }; 318de57606cSSage Weil 319de57606cSSage Weil static inline struct ceph_inode_info *ceph_inode(struct inode *inode) 320de57606cSSage Weil { 321fbbccec9SNoah Watkins return container_of(inode, struct ceph_inode_info, vfs_inode); 322de57606cSSage Weil } 323de57606cSSage Weil 324ad1fee96SYehuda Sadeh static inline struct ceph_fs_client *ceph_inode_to_client(struct inode *inode) 325ad1fee96SYehuda Sadeh { 326ad1fee96SYehuda Sadeh return (struct ceph_fs_client *)inode->i_sb->s_fs_info; 327ad1fee96SYehuda Sadeh } 328ad1fee96SYehuda Sadeh 329ad1fee96SYehuda Sadeh static inline struct ceph_fs_client *ceph_sb_to_client(struct super_block *sb) 330ad1fee96SYehuda Sadeh { 331ad1fee96SYehuda Sadeh return (struct ceph_fs_client *)sb->s_fs_info; 332ad1fee96SYehuda Sadeh } 333ad1fee96SYehuda Sadeh 3343d14c5d2SYehuda Sadeh static inline struct ceph_vino ceph_vino(struct inode *inode) 3353d14c5d2SYehuda Sadeh { 3363d14c5d2SYehuda Sadeh return ceph_inode(inode)->i_vino; 3373d14c5d2SYehuda Sadeh } 3383d14c5d2SYehuda Sadeh 3393d14c5d2SYehuda Sadeh /* 3403d14c5d2SYehuda Sadeh * ino_t is <64 bits on many architectures, blech. 3413d14c5d2SYehuda Sadeh * 342ad1fee96SYehuda Sadeh * i_ino (kernel inode) st_ino (userspace) 343ad1fee96SYehuda Sadeh * i386 32 32 344ad1fee96SYehuda Sadeh * x86_64+ino32 64 32 345ad1fee96SYehuda Sadeh * x86_64 64 64 346ad1fee96SYehuda Sadeh */ 347ad1fee96SYehuda Sadeh static inline u32 ceph_ino_to_ino32(ino_t ino) 348ad1fee96SYehuda Sadeh { 349ad1fee96SYehuda Sadeh ino ^= ino >> (sizeof(ino) * 8 - 32); 350ad1fee96SYehuda Sadeh if (!ino) 351ad1fee96SYehuda Sadeh ino = 1; 352ad1fee96SYehuda Sadeh return ino; 353ad1fee96SYehuda Sadeh } 354ad1fee96SYehuda Sadeh 355ad1fee96SYehuda Sadeh /* 356ad1fee96SYehuda Sadeh * kernel i_ino value 3573d14c5d2SYehuda Sadeh */ 3583d14c5d2SYehuda Sadeh static inline ino_t ceph_vino_to_ino(struct ceph_vino vino) 3593d14c5d2SYehuda Sadeh { 3603d14c5d2SYehuda Sadeh ino_t ino = (ino_t)vino.ino; /* ^ (vino.snap << 20); */ 3613d14c5d2SYehuda Sadeh #if BITS_PER_LONG == 32 362ad1fee96SYehuda Sadeh ino = ceph_ino_to_ino32(ino); 3633d14c5d2SYehuda Sadeh #endif 3643d14c5d2SYehuda Sadeh return ino; 3653d14c5d2SYehuda Sadeh } 3663d14c5d2SYehuda Sadeh 367ad1fee96SYehuda Sadeh /* 368ad1fee96SYehuda Sadeh * user-visible ino (stat, filldir) 369ad1fee96SYehuda Sadeh */ 370ad1fee96SYehuda Sadeh #if BITS_PER_LONG == 32 371ad1fee96SYehuda Sadeh static inline ino_t ceph_translate_ino(struct super_block *sb, ino_t ino) 372ad1fee96SYehuda Sadeh { 373ad1fee96SYehuda Sadeh return ino; 374ad1fee96SYehuda Sadeh } 375ad1fee96SYehuda Sadeh #else 376ad1fee96SYehuda Sadeh static inline ino_t ceph_translate_ino(struct super_block *sb, ino_t ino) 377ad1fee96SYehuda Sadeh { 378ad1fee96SYehuda Sadeh if (ceph_test_mount_opt(ceph_sb_to_client(sb), INO32)) 379ad1fee96SYehuda Sadeh ino = ceph_ino_to_ino32(ino); 380ad1fee96SYehuda Sadeh return ino; 381ad1fee96SYehuda Sadeh } 382ad1fee96SYehuda Sadeh #endif 383ad1fee96SYehuda Sadeh 384ad1fee96SYehuda Sadeh 3853d14c5d2SYehuda Sadeh /* for printf-style formatting */ 3863d14c5d2SYehuda Sadeh #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap 3873d14c5d2SYehuda Sadeh 3883d14c5d2SYehuda Sadeh static inline u64 ceph_ino(struct inode *inode) 3893d14c5d2SYehuda Sadeh { 3903d14c5d2SYehuda Sadeh return ceph_inode(inode)->i_vino.ino; 3913d14c5d2SYehuda Sadeh } 3923d14c5d2SYehuda Sadeh static inline u64 ceph_snap(struct inode *inode) 3933d14c5d2SYehuda Sadeh { 3943d14c5d2SYehuda Sadeh return ceph_inode(inode)->i_vino.snap; 3953d14c5d2SYehuda Sadeh } 3963d14c5d2SYehuda Sadeh 3973d14c5d2SYehuda Sadeh static inline int ceph_ino_compare(struct inode *inode, void *data) 3983d14c5d2SYehuda Sadeh { 3993d14c5d2SYehuda Sadeh struct ceph_vino *pvino = (struct ceph_vino *)data; 4003d14c5d2SYehuda Sadeh struct ceph_inode_info *ci = ceph_inode(inode); 4013d14c5d2SYehuda Sadeh return ci->i_vino.ino == pvino->ino && 4023d14c5d2SYehuda Sadeh ci->i_vino.snap == pvino->snap; 4033d14c5d2SYehuda Sadeh } 4043d14c5d2SYehuda Sadeh 4053d14c5d2SYehuda Sadeh static inline struct inode *ceph_find_inode(struct super_block *sb, 4063d14c5d2SYehuda Sadeh struct ceph_vino vino) 4073d14c5d2SYehuda Sadeh { 4083d14c5d2SYehuda Sadeh ino_t t = ceph_vino_to_ino(vino); 4093d14c5d2SYehuda Sadeh return ilookup5(sb, t, ceph_ino_compare, &vino); 4103d14c5d2SYehuda Sadeh } 4113d14c5d2SYehuda Sadeh 4123d14c5d2SYehuda Sadeh 4133d14c5d2SYehuda Sadeh /* 4143d14c5d2SYehuda Sadeh * Ceph inode. 4153d14c5d2SYehuda Sadeh */ 4163d14c5d2SYehuda Sadeh #define CEPH_I_COMPLETE 1 /* we have complete directory cached */ 4173d14c5d2SYehuda Sadeh #define CEPH_I_NODELAY 4 /* do not delay cap release */ 4183d14c5d2SYehuda Sadeh #define CEPH_I_FLUSH 8 /* do not delay flush of dirty metadata */ 4193d14c5d2SYehuda Sadeh #define CEPH_I_NOFLUSH 16 /* do not flush dirty caps */ 4203d14c5d2SYehuda Sadeh 421de57606cSSage Weil static inline void ceph_i_clear(struct inode *inode, unsigned mask) 422de57606cSSage Weil { 423de57606cSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 424de57606cSSage Weil 425de57606cSSage Weil spin_lock(&inode->i_lock); 426de57606cSSage Weil ci->i_ceph_flags &= ~mask; 427de57606cSSage Weil spin_unlock(&inode->i_lock); 428de57606cSSage Weil } 429de57606cSSage Weil 430de57606cSSage Weil static inline void ceph_i_set(struct inode *inode, unsigned mask) 431de57606cSSage Weil { 432de57606cSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 433de57606cSSage Weil 434de57606cSSage Weil spin_lock(&inode->i_lock); 435de57606cSSage Weil ci->i_ceph_flags |= mask; 436de57606cSSage Weil spin_unlock(&inode->i_lock); 437de57606cSSage Weil } 438de57606cSSage Weil 439de57606cSSage Weil static inline bool ceph_i_test(struct inode *inode, unsigned mask) 440de57606cSSage Weil { 441de57606cSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 442de57606cSSage Weil bool r; 443de57606cSSage Weil 444efa4c120SSage Weil spin_lock(&inode->i_lock); 445de57606cSSage Weil r = (ci->i_ceph_flags & mask) == mask; 446efa4c120SSage Weil spin_unlock(&inode->i_lock); 447de57606cSSage Weil return r; 448de57606cSSage Weil } 449de57606cSSage Weil 450de57606cSSage Weil 451de57606cSSage Weil /* find a specific frag @f */ 452de57606cSSage Weil extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, 453de57606cSSage Weil u32 f); 454de57606cSSage Weil 455de57606cSSage Weil /* 456de57606cSSage Weil * choose fragment for value @v. copy frag content to pfrag, if leaf 457de57606cSSage Weil * exists 458de57606cSSage Weil */ 459de57606cSSage Weil extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, 460de57606cSSage Weil struct ceph_inode_frag *pfrag, 461de57606cSSage Weil int *found); 462de57606cSSage Weil 463de57606cSSage Weil static inline struct ceph_dentry_info *ceph_dentry(struct dentry *dentry) 464de57606cSSage Weil { 465de57606cSSage Weil return (struct ceph_dentry_info *)dentry->d_fsdata; 466de57606cSSage Weil } 467de57606cSSage Weil 468de57606cSSage Weil static inline loff_t ceph_make_fpos(unsigned frag, unsigned off) 469de57606cSSage Weil { 470de57606cSSage Weil return ((loff_t)frag << 32) | (loff_t)off; 471de57606cSSage Weil } 472de57606cSSage Weil 473de57606cSSage Weil /* 474de57606cSSage Weil * caps helpers 475de57606cSSage Weil */ 476de57606cSSage Weil static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci) 477de57606cSSage Weil { 478de57606cSSage Weil return !RB_EMPTY_ROOT(&ci->i_caps); 479de57606cSSage Weil } 480de57606cSSage Weil 481de57606cSSage Weil extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented); 482de57606cSSage Weil extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t); 483de57606cSSage Weil extern int __ceph_caps_issued_other(struct ceph_inode_info *ci, 484de57606cSSage Weil struct ceph_cap *cap); 485de57606cSSage Weil 486de57606cSSage Weil static inline int ceph_caps_issued(struct ceph_inode_info *ci) 487de57606cSSage Weil { 488de57606cSSage Weil int issued; 489de57606cSSage Weil spin_lock(&ci->vfs_inode.i_lock); 490de57606cSSage Weil issued = __ceph_caps_issued(ci, NULL); 491de57606cSSage Weil spin_unlock(&ci->vfs_inode.i_lock); 492de57606cSSage Weil return issued; 493de57606cSSage Weil } 494de57606cSSage Weil 495de57606cSSage Weil static inline int ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, 496de57606cSSage Weil int touch) 497de57606cSSage Weil { 498de57606cSSage Weil int r; 499de57606cSSage Weil spin_lock(&ci->vfs_inode.i_lock); 500de57606cSSage Weil r = __ceph_caps_issued_mask(ci, mask, touch); 501de57606cSSage Weil spin_unlock(&ci->vfs_inode.i_lock); 502de57606cSSage Weil return r; 503de57606cSSage Weil } 504de57606cSSage Weil 505de57606cSSage Weil static inline int __ceph_caps_dirty(struct ceph_inode_info *ci) 506de57606cSSage Weil { 507de57606cSSage Weil return ci->i_dirty_caps | ci->i_flushing_caps; 508de57606cSSage Weil } 509fca65b4aSSage Weil extern int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask); 510de57606cSSage Weil 511de57606cSSage Weil extern int ceph_caps_revoking(struct ceph_inode_info *ci, int mask); 512de57606cSSage Weil extern int __ceph_caps_used(struct ceph_inode_info *ci); 513de57606cSSage Weil 514de57606cSSage Weil extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci); 515de57606cSSage Weil 516de57606cSSage Weil /* 517de57606cSSage Weil * wanted, by virtue of open file modes AND cap refs (buffered/cached data) 518de57606cSSage Weil */ 519de57606cSSage Weil static inline int __ceph_caps_wanted(struct ceph_inode_info *ci) 520de57606cSSage Weil { 521de57606cSSage Weil int w = __ceph_caps_file_wanted(ci) | __ceph_caps_used(ci); 522de57606cSSage Weil if (w & CEPH_CAP_FILE_BUFFER) 523de57606cSSage Weil w |= CEPH_CAP_FILE_EXCL; /* we want EXCL if dirty data */ 524de57606cSSage Weil return w; 525de57606cSSage Weil } 526de57606cSSage Weil 527de57606cSSage Weil /* what the mds thinks we want */ 528de57606cSSage Weil extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci); 529de57606cSSage Weil 53037151668SYehuda Sadeh extern void ceph_caps_init(struct ceph_mds_client *mdsc); 53137151668SYehuda Sadeh extern void ceph_caps_finalize(struct ceph_mds_client *mdsc); 53237151668SYehuda Sadeh extern void ceph_adjust_min_caps(struct ceph_mds_client *mdsc, int delta); 53337151668SYehuda Sadeh extern int ceph_reserve_caps(struct ceph_mds_client *mdsc, 53437151668SYehuda Sadeh struct ceph_cap_reservation *ctx, int need); 53537151668SYehuda Sadeh extern int ceph_unreserve_caps(struct ceph_mds_client *mdsc, 53637151668SYehuda Sadeh struct ceph_cap_reservation *ctx); 5373d14c5d2SYehuda Sadeh extern void ceph_reservation_status(struct ceph_fs_client *client, 538de57606cSSage Weil int *total, int *avail, int *used, 53985ccce43SSage Weil int *reserved, int *min); 540de57606cSSage Weil 541de57606cSSage Weil 542de57606cSSage Weil 543de57606cSSage Weil /* 544de57606cSSage Weil * we keep buffered readdir results attached to file->private_data 545de57606cSSage Weil */ 5464918b6d1SSage Weil #define CEPH_F_SYNC 1 5479cfa1098SSage Weil #define CEPH_F_ATEND 2 5484918b6d1SSage Weil 549de57606cSSage Weil struct ceph_file_info { 550252c6728SSage Weil short fmode; /* initialized on open */ 551252c6728SSage Weil short flags; /* CEPH_F_* */ 552de57606cSSage Weil 553de57606cSSage Weil /* readdir: position within the dir */ 554de57606cSSage Weil u32 frag; 555de57606cSSage Weil struct ceph_mds_request *last_readdir; 556de57606cSSage Weil 557de57606cSSage Weil /* readdir: position within a frag */ 558de57606cSSage Weil unsigned offset; /* offset of last chunk, adjusted for . and .. */ 559de57606cSSage Weil u64 next_offset; /* offset of next chunk (last_name's + 1) */ 560de57606cSSage Weil char *last_name; /* last entry in previous chunk */ 561de57606cSSage Weil struct dentry *dentry; /* next dentry (for dcache readdir) */ 562de57606cSSage Weil unsigned long dir_release_count; 563de57606cSSage Weil 564de57606cSSage Weil /* used for -o dirstat read() on directory thing */ 565de57606cSSage Weil char *dir_info; 566de57606cSSage Weil int dir_info_len; 567de57606cSSage Weil }; 568de57606cSSage Weil 569de57606cSSage Weil 570de57606cSSage Weil 571de57606cSSage Weil /* 572de57606cSSage Weil * A "snap realm" describes a subset of the file hierarchy sharing 573de57606cSSage Weil * the same set of snapshots that apply to it. The realms themselves 574de57606cSSage Weil * are organized into a hierarchy, such that children inherit (some of) 575de57606cSSage Weil * the snapshots of their parents. 576de57606cSSage Weil * 577de57606cSSage Weil * All inodes within the realm that have capabilities are linked into a 578de57606cSSage Weil * per-realm list. 579de57606cSSage Weil */ 580de57606cSSage Weil struct ceph_snap_realm { 581de57606cSSage Weil u64 ino; 582de57606cSSage Weil atomic_t nref; 583a105f00cSSage Weil struct rb_node node; 584a105f00cSSage Weil 585de57606cSSage Weil u64 created, seq; 586de57606cSSage Weil u64 parent_ino; 587de57606cSSage Weil u64 parent_since; /* snapid when our current parent became so */ 588de57606cSSage Weil 589de57606cSSage Weil u64 *prior_parent_snaps; /* snaps inherited from any parents we */ 590de57606cSSage Weil int num_prior_parent_snaps; /* had prior to parent_since */ 591de57606cSSage Weil u64 *snaps; /* snaps specific to this realm */ 592de57606cSSage Weil int num_snaps; 593de57606cSSage Weil 594de57606cSSage Weil struct ceph_snap_realm *parent; 595de57606cSSage Weil struct list_head children; /* list of child realms */ 596de57606cSSage Weil struct list_head child_item; 597de57606cSSage Weil 598de57606cSSage Weil struct list_head empty_item; /* if i have ref==0 */ 599de57606cSSage Weil 600ae00d4f3SSage Weil struct list_head dirty_item; /* if realm needs new context */ 601ae00d4f3SSage Weil 602de57606cSSage Weil /* the current set of snaps for this realm */ 603de57606cSSage Weil struct ceph_snap_context *cached_context; 604de57606cSSage Weil 605de57606cSSage Weil struct list_head inodes_with_caps; 606de57606cSSage Weil spinlock_t inodes_with_caps_lock; 607de57606cSSage Weil }; 608de57606cSSage Weil 6093d14c5d2SYehuda Sadeh static inline int default_congestion_kb(void) 6103d14c5d2SYehuda Sadeh { 6113d14c5d2SYehuda Sadeh int congestion_kb; 612de57606cSSage Weil 613de57606cSSage Weil /* 6143d14c5d2SYehuda Sadeh * Copied from NFS 6153d14c5d2SYehuda Sadeh * 6163d14c5d2SYehuda Sadeh * congestion size, scale with available memory. 6173d14c5d2SYehuda Sadeh * 6183d14c5d2SYehuda Sadeh * 64MB: 8192k 6193d14c5d2SYehuda Sadeh * 128MB: 11585k 6203d14c5d2SYehuda Sadeh * 256MB: 16384k 6213d14c5d2SYehuda Sadeh * 512MB: 23170k 6223d14c5d2SYehuda Sadeh * 1GB: 32768k 6233d14c5d2SYehuda Sadeh * 2GB: 46340k 6243d14c5d2SYehuda Sadeh * 4GB: 65536k 6253d14c5d2SYehuda Sadeh * 8GB: 92681k 6263d14c5d2SYehuda Sadeh * 16GB: 131072k 6273d14c5d2SYehuda Sadeh * 6283d14c5d2SYehuda Sadeh * This allows larger machines to have larger/more transfers. 6293d14c5d2SYehuda Sadeh * Limit the default to 256M 630de57606cSSage Weil */ 6313d14c5d2SYehuda Sadeh congestion_kb = (16*int_sqrt(totalram_pages)) << (PAGE_SHIFT-10); 6323d14c5d2SYehuda Sadeh if (congestion_kb > 256*1024) 6333d14c5d2SYehuda Sadeh congestion_kb = 256*1024; 6343d14c5d2SYehuda Sadeh 6353d14c5d2SYehuda Sadeh return congestion_kb; 636de57606cSSage Weil } 637de57606cSSage Weil 638de57606cSSage Weil 639de57606cSSage Weil 640de57606cSSage Weil /* snap.c */ 641de57606cSSage Weil struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc, 642de57606cSSage Weil u64 ino); 643de57606cSSage Weil extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc, 644de57606cSSage Weil struct ceph_snap_realm *realm); 645de57606cSSage Weil extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc, 646de57606cSSage Weil struct ceph_snap_realm *realm); 647de57606cSSage Weil extern int ceph_update_snap_trace(struct ceph_mds_client *m, 648de57606cSSage Weil void *p, void *e, bool deletion); 649de57606cSSage Weil extern void ceph_handle_snap(struct ceph_mds_client *mdsc, 6502600d2ddSSage Weil struct ceph_mds_session *session, 651de57606cSSage Weil struct ceph_msg *msg); 652fc837c8fSSage Weil extern void ceph_queue_cap_snap(struct ceph_inode_info *ci); 653de57606cSSage Weil extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci, 654de57606cSSage Weil struct ceph_cap_snap *capsnap); 655de57606cSSage Weil extern void ceph_cleanup_empty_realms(struct ceph_mds_client *mdsc); 656de57606cSSage Weil 657de57606cSSage Weil /* 658de57606cSSage Weil * a cap_snap is "pending" if it is still awaiting an in-progress 659de57606cSSage Weil * sync write (that may/may not still update size, mtime, etc.). 660de57606cSSage Weil */ 661de57606cSSage Weil static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci) 662de57606cSSage Weil { 663de57606cSSage Weil return !list_empty(&ci->i_cap_snaps) && 664de57606cSSage Weil list_entry(ci->i_cap_snaps.prev, struct ceph_cap_snap, 665de57606cSSage Weil ci_item)->writing; 666de57606cSSage Weil } 667de57606cSSage Weil 668de57606cSSage Weil /* inode.c */ 669de57606cSSage Weil extern const struct inode_operations ceph_file_iops; 670de57606cSSage Weil 671de57606cSSage Weil extern struct inode *ceph_alloc_inode(struct super_block *sb); 672de57606cSSage Weil extern void ceph_destroy_inode(struct inode *inode); 673de57606cSSage Weil 674de57606cSSage Weil extern struct inode *ceph_get_inode(struct super_block *sb, 675de57606cSSage Weil struct ceph_vino vino); 676de57606cSSage Weil extern struct inode *ceph_get_snapdir(struct inode *parent); 677de57606cSSage Weil extern int ceph_fill_file_size(struct inode *inode, int issued, 678de57606cSSage Weil u32 truncate_seq, u64 truncate_size, u64 size); 679de57606cSSage Weil extern void ceph_fill_file_time(struct inode *inode, int issued, 680de57606cSSage Weil u64 time_warp_seq, struct timespec *ctime, 681de57606cSSage Weil struct timespec *mtime, struct timespec *atime); 682de57606cSSage Weil extern int ceph_fill_trace(struct super_block *sb, 683de57606cSSage Weil struct ceph_mds_request *req, 684de57606cSSage Weil struct ceph_mds_session *session); 685de57606cSSage Weil extern int ceph_readdir_prepopulate(struct ceph_mds_request *req, 686de57606cSSage Weil struct ceph_mds_session *session); 687de57606cSSage Weil 688de57606cSSage Weil extern int ceph_inode_holds_cap(struct inode *inode, int mask); 689de57606cSSage Weil 690de57606cSSage Weil extern int ceph_inode_set_size(struct inode *inode, loff_t size); 691de57606cSSage Weil extern void __ceph_do_pending_vmtruncate(struct inode *inode); 6923c6f6b79SSage Weil extern void ceph_queue_vmtruncate(struct inode *inode); 6933c6f6b79SSage Weil 6943c6f6b79SSage Weil extern void ceph_queue_invalidate(struct inode *inode); 6953c6f6b79SSage Weil extern void ceph_queue_writeback(struct inode *inode); 696de57606cSSage Weil 697de57606cSSage Weil extern int ceph_do_getattr(struct inode *inode, int mask); 698b74c79e9SNick Piggin extern int ceph_permission(struct inode *inode, int mask, unsigned int flags); 699de57606cSSage Weil extern int ceph_setattr(struct dentry *dentry, struct iattr *attr); 700de57606cSSage Weil extern int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry, 701de57606cSSage Weil struct kstat *stat); 702de57606cSSage Weil 703de57606cSSage Weil /* xattr.c */ 704de57606cSSage Weil extern int ceph_setxattr(struct dentry *, const char *, const void *, 705de57606cSSage Weil size_t, int); 706de57606cSSage Weil extern ssize_t ceph_getxattr(struct dentry *, const char *, void *, size_t); 707de57606cSSage Weil extern ssize_t ceph_listxattr(struct dentry *, char *, size_t); 708de57606cSSage Weil extern int ceph_removexattr(struct dentry *, const char *); 709de57606cSSage Weil extern void __ceph_build_xattrs_blob(struct ceph_inode_info *ci); 710de57606cSSage Weil extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci); 711de57606cSSage Weil 712de57606cSSage Weil /* caps.c */ 713de57606cSSage Weil extern const char *ceph_cap_string(int c); 714de57606cSSage Weil extern void ceph_handle_caps(struct ceph_mds_session *session, 715de57606cSSage Weil struct ceph_msg *msg); 716de57606cSSage Weil extern int ceph_add_cap(struct inode *inode, 717de57606cSSage Weil struct ceph_mds_session *session, u64 cap_id, 718de57606cSSage Weil int fmode, unsigned issued, unsigned wanted, 719de57606cSSage Weil unsigned cap, unsigned seq, u64 realmino, int flags, 720de57606cSSage Weil struct ceph_cap_reservation *caps_reservation); 7217c1332b8SSage Weil extern void __ceph_remove_cap(struct ceph_cap *cap); 722de57606cSSage Weil static inline void ceph_remove_cap(struct ceph_cap *cap) 723de57606cSSage Weil { 724de57606cSSage Weil struct inode *inode = &cap->ci->vfs_inode; 725de57606cSSage Weil spin_lock(&inode->i_lock); 7267c1332b8SSage Weil __ceph_remove_cap(cap); 727de57606cSSage Weil spin_unlock(&inode->i_lock); 728de57606cSSage Weil } 72937151668SYehuda Sadeh extern void ceph_put_cap(struct ceph_mds_client *mdsc, 73037151668SYehuda Sadeh struct ceph_cap *cap); 731de57606cSSage Weil 732de57606cSSage Weil extern void ceph_queue_caps_release(struct inode *inode); 733f1a3d572SStephen Rothwell extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc); 7347ea80859SChristoph Hellwig extern int ceph_fsync(struct file *file, int datasync); 735de57606cSSage Weil extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc, 736de57606cSSage Weil struct ceph_mds_session *session); 7372bc50259SGreg Farnum extern struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci, 7382bc50259SGreg Farnum int mds); 739de57606cSSage Weil extern int ceph_get_cap_mds(struct inode *inode); 740de57606cSSage Weil extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps); 741de57606cSSage Weil extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had); 742de57606cSSage Weil extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr, 743de57606cSSage Weil struct ceph_snap_context *snapc); 744de57606cSSage Weil extern void __ceph_flush_snaps(struct ceph_inode_info *ci, 745e835124cSSage Weil struct ceph_mds_session **psession, 746e835124cSSage Weil int again); 747de57606cSSage Weil extern void ceph_check_caps(struct ceph_inode_info *ci, int flags, 748de57606cSSage Weil struct ceph_mds_session *session); 749afcdaea3SSage Weil extern void ceph_check_delayed_caps(struct ceph_mds_client *mdsc); 750afcdaea3SSage Weil extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc); 751de57606cSSage Weil 752de57606cSSage Weil extern int ceph_encode_inode_release(void **p, struct inode *inode, 753de57606cSSage Weil int mds, int drop, int unless, int force); 754de57606cSSage Weil extern int ceph_encode_dentry_release(void **p, struct dentry *dn, 755de57606cSSage Weil int mds, int drop, int unless); 756de57606cSSage Weil 757de57606cSSage Weil extern int ceph_get_caps(struct ceph_inode_info *ci, int need, int want, 758de57606cSSage Weil int *got, loff_t endoff); 759de57606cSSage Weil 760de57606cSSage Weil /* for counting open files by mode */ 761de57606cSSage Weil static inline void __ceph_get_fmode(struct ceph_inode_info *ci, int mode) 762de57606cSSage Weil { 763de57606cSSage Weil ci->i_nr_by_mode[mode]++; 764de57606cSSage Weil } 765de57606cSSage Weil extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode); 766de57606cSSage Weil 767de57606cSSage Weil /* addr.c */ 768de57606cSSage Weil extern const struct address_space_operations ceph_aops; 769de57606cSSage Weil extern int ceph_mmap(struct file *file, struct vm_area_struct *vma); 770de57606cSSage Weil 771de57606cSSage Weil /* file.c */ 772de57606cSSage Weil extern const struct file_operations ceph_file_fops; 773de57606cSSage Weil extern const struct address_space_operations ceph_aops; 7743d14c5d2SYehuda Sadeh extern int ceph_copy_to_page_vector(struct page **pages, 7753d14c5d2SYehuda Sadeh const char *data, 7763d14c5d2SYehuda Sadeh loff_t off, size_t len); 7773d14c5d2SYehuda Sadeh extern int ceph_copy_from_page_vector(struct page **pages, 7783d14c5d2SYehuda Sadeh char *data, 7793d14c5d2SYehuda Sadeh loff_t off, size_t len); 7803d14c5d2SYehuda Sadeh extern struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags); 781de57606cSSage Weil extern int ceph_open(struct inode *inode, struct file *file); 782de57606cSSage Weil extern struct dentry *ceph_lookup_open(struct inode *dir, struct dentry *dentry, 783de57606cSSage Weil struct nameidata *nd, int mode, 784de57606cSSage Weil int locked_dir); 785de57606cSSage Weil extern int ceph_release(struct inode *inode, struct file *filp); 786de57606cSSage Weil 787de57606cSSage Weil /* dir.c */ 788de57606cSSage Weil extern const struct file_operations ceph_dir_fops; 789de57606cSSage Weil extern const struct inode_operations ceph_dir_iops; 79052dfb8acSSage Weil extern const struct dentry_operations ceph_dentry_ops, ceph_snap_dentry_ops, 791de57606cSSage Weil ceph_snapdir_dentry_ops; 792de57606cSSage Weil 793de57606cSSage Weil extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry); 794468640e3SSage Weil extern int ceph_handle_snapdir(struct ceph_mds_request *req, 795468640e3SSage Weil struct dentry *dentry, int err); 796de57606cSSage Weil extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req, 797de57606cSSage Weil struct dentry *dentry, int err); 798de57606cSSage Weil 799de57606cSSage Weil extern void ceph_dentry_lru_add(struct dentry *dn); 800de57606cSSage Weil extern void ceph_dentry_lru_touch(struct dentry *dn); 801de57606cSSage Weil extern void ceph_dentry_lru_del(struct dentry *dn); 80281a6cf2dSSage Weil extern void ceph_invalidate_dentry_lease(struct dentry *dentry); 8036c0f3af7SSage Weil extern unsigned ceph_dentry_hash(struct dentry *dn); 804*5f21c96dSSage Weil extern struct inode *ceph_get_dentry_parent_inode(struct dentry *dentry); 805de57606cSSage Weil 806de57606cSSage Weil /* 807de57606cSSage Weil * our d_ops vary depending on whether the inode is live, 808de57606cSSage Weil * snapshotted (read-only), or a virtual ".snap" directory. 809de57606cSSage Weil */ 810de57606cSSage Weil int ceph_init_dentry(struct dentry *dentry); 811de57606cSSage Weil 812de57606cSSage Weil 813de57606cSSage Weil /* ioctl.c */ 814de57606cSSage Weil extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 815de57606cSSage Weil 816de57606cSSage Weil /* export.c */ 817de57606cSSage Weil extern const struct export_operations ceph_export_ops; 818de57606cSSage Weil 81940819f6fSGreg Farnum /* locks.c */ 82040819f6fSGreg Farnum extern int ceph_lock(struct file *file, int cmd, struct file_lock *fl); 82140819f6fSGreg Farnum extern int ceph_flock(struct file *file, int cmd, struct file_lock *fl); 82240819f6fSGreg Farnum extern void ceph_count_locks(struct inode *inode, int *p_num, int *f_num); 82340819f6fSGreg Farnum extern int ceph_encode_locks(struct inode *i, struct ceph_pagelist *p, 82440819f6fSGreg Farnum int p_locks, int f_locks); 82540819f6fSGreg Farnum extern int lock_to_ceph_filelock(struct file_lock *fl, struct ceph_filelock *c); 82640819f6fSGreg Farnum 8273d14c5d2SYehuda Sadeh /* debugfs.c */ 8283d14c5d2SYehuda Sadeh extern int ceph_fs_debugfs_init(struct ceph_fs_client *client); 8293d14c5d2SYehuda Sadeh extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client); 8303d14c5d2SYehuda Sadeh 831de57606cSSage Weil #endif /* _FS_CEPH_SUPER_H */ 832