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- /* SPDX-License-Identifier: GPL-2.0 */
- #ifndef _FS_CEPH_SUPER_H
- #define _FS_CEPH_SUPER_H
- #include <linux/ceph/ceph_debug.h>
- #include <asm/unaligned.h>
- #include <linux/backing-dev.h>
- #include <linux/completion.h>
- #include <linux/exportfs.h>
- #include <linux/fs.h>
- #include <linux/mempool.h>
- #include <linux/pagemap.h>
- #include <linux/wait.h>
- #include <linux/writeback.h>
- #include <linux/slab.h>
- #include <linux/posix_acl.h>
- #include <linux/refcount.h>
- #include <linux/security.h>
- #include <linux/netfs.h>
- #include <linux/fscache.h>
- #include <linux/hashtable.h>
- #include <linux/ceph/libceph.h>
- /* large granularity for statfs utilization stats to facilitate
- * large volume sizes on 32-bit machines. */
- #define CEPH_BLOCK_SHIFT 22 /* 4 MB */
- #define CEPH_BLOCK (1 << CEPH_BLOCK_SHIFT)
- #define CEPH_4K_BLOCK_SHIFT 12 /* 4 KB */
- #define CEPH_MOUNT_OPT_CLEANRECOVER (1<<1) /* auto reonnect (clean mode) after blocklisted */
- #define CEPH_MOUNT_OPT_DIRSTAT (1<<4) /* `cat dirname` for stats */
- #define CEPH_MOUNT_OPT_RBYTES (1<<5) /* dir st_bytes = rbytes */
- #define CEPH_MOUNT_OPT_NOASYNCREADDIR (1<<7) /* no dcache readdir */
- #define CEPH_MOUNT_OPT_INO32 (1<<8) /* 32 bit inos */
- #define CEPH_MOUNT_OPT_DCACHE (1<<9) /* use dcache for readdir etc */
- #define CEPH_MOUNT_OPT_FSCACHE (1<<10) /* use fscache */
- #define CEPH_MOUNT_OPT_NOPOOLPERM (1<<11) /* no pool permission check */
- #define CEPH_MOUNT_OPT_MOUNTWAIT (1<<12) /* mount waits if no mds is up */
- #define CEPH_MOUNT_OPT_NOQUOTADF (1<<13) /* no root dir quota in statfs */
- #define CEPH_MOUNT_OPT_NOCOPYFROM (1<<14) /* don't use RADOS 'copy-from' op */
- #define CEPH_MOUNT_OPT_ASYNC_DIROPS (1<<15) /* allow async directory ops */
- #define CEPH_MOUNT_OPT_NOPAGECACHE (1<<16) /* bypass pagecache altogether */
- #define CEPH_MOUNT_OPT_DEFAULT \
- (CEPH_MOUNT_OPT_DCACHE | \
- CEPH_MOUNT_OPT_NOCOPYFROM | \
- CEPH_MOUNT_OPT_ASYNC_DIROPS)
- #define ceph_set_mount_opt(fsc, opt) \
- (fsc)->mount_options->flags |= CEPH_MOUNT_OPT_##opt
- #define ceph_clear_mount_opt(fsc, opt) \
- (fsc)->mount_options->flags &= ~CEPH_MOUNT_OPT_##opt
- #define ceph_test_mount_opt(fsc, opt) \
- (!!((fsc)->mount_options->flags & CEPH_MOUNT_OPT_##opt))
- /* max size of osd read request, limited by libceph */
- #define CEPH_MAX_READ_SIZE CEPH_MSG_MAX_DATA_LEN
- /* osd has a configurable limitaion of max write size.
- * CEPH_MSG_MAX_DATA_LEN should be small enough. */
- #define CEPH_MAX_WRITE_SIZE CEPH_MSG_MAX_DATA_LEN
- #define CEPH_RASIZE_DEFAULT (8192*1024) /* max readahead */
- #define CEPH_MAX_READDIR_DEFAULT 1024
- #define CEPH_MAX_READDIR_BYTES_DEFAULT (512*1024)
- #define CEPH_SNAPDIRNAME_DEFAULT ".snap"
- /*
- * Delay telling the MDS we no longer want caps, in case we reopen
- * the file. Delay a minimum amount of time, even if we send a cap
- * message for some other reason. Otherwise, take the oppotunity to
- * update the mds to avoid sending another message later.
- */
- #define CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT 5 /* cap release delay */
- #define CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT 60 /* cap release delay */
- struct ceph_mount_options {
- unsigned int flags;
- unsigned int wsize; /* max write size */
- unsigned int rsize; /* max read size */
- unsigned int rasize; /* max readahead */
- unsigned int congestion_kb; /* max writeback in flight */
- unsigned int caps_wanted_delay_min, caps_wanted_delay_max;
- int caps_max;
- unsigned int max_readdir; /* max readdir result (entries) */
- unsigned int max_readdir_bytes; /* max readdir result (bytes) */
- bool new_dev_syntax;
- /*
- * everything above this point can be memcmp'd; everything below
- * is handled in compare_mount_options()
- */
- char *snapdir_name; /* default ".snap" */
- char *mds_namespace; /* default NULL */
- char *server_path; /* default NULL (means "/") */
- char *fscache_uniq; /* default NULL */
- char *mon_addr;
- };
- /* mount state */
- enum {
- CEPH_MOUNT_MOUNTING,
- CEPH_MOUNT_MOUNTED,
- CEPH_MOUNT_UNMOUNTING,
- CEPH_MOUNT_UNMOUNTED,
- CEPH_MOUNT_SHUTDOWN,
- CEPH_MOUNT_RECOVER,
- CEPH_MOUNT_FENCE_IO,
- };
- #define CEPH_ASYNC_CREATE_CONFLICT_BITS 8
- struct ceph_fs_client {
- struct super_block *sb;
- struct list_head metric_wakeup;
- struct ceph_mount_options *mount_options;
- struct ceph_client *client;
- int mount_state;
- bool blocklisted;
- bool have_copy_from2;
- u32 filp_gen;
- loff_t max_file_size;
- struct ceph_mds_client *mdsc;
- atomic_long_t writeback_count;
- bool write_congested;
- struct workqueue_struct *inode_wq;
- struct workqueue_struct *cap_wq;
- DECLARE_HASHTABLE(async_unlink_conflict, CEPH_ASYNC_CREATE_CONFLICT_BITS);
- spinlock_t async_unlink_conflict_lock;
- #ifdef CONFIG_DEBUG_FS
- struct dentry *debugfs_dentry_lru, *debugfs_caps;
- struct dentry *debugfs_congestion_kb;
- struct dentry *debugfs_bdi;
- struct dentry *debugfs_mdsc, *debugfs_mdsmap;
- struct dentry *debugfs_status;
- struct dentry *debugfs_mds_sessions;
- struct dentry *debugfs_metrics_dir;
- #endif
- #ifdef CONFIG_CEPH_FSCACHE
- struct fscache_volume *fscache;
- #endif
- };
- /*
- * File i/o capability. This tracks shared state with the metadata
- * server that allows us to cache or writeback attributes or to read
- * and write data. For any given inode, we should have one or more
- * capabilities, one issued by each metadata server, and our
- * cumulative access is the OR of all issued capabilities.
- *
- * Each cap is referenced by the inode's i_caps rbtree and by per-mds
- * session capability lists.
- */
- struct ceph_cap {
- struct ceph_inode_info *ci;
- struct rb_node ci_node; /* per-ci cap tree */
- struct ceph_mds_session *session;
- struct list_head session_caps; /* per-session caplist */
- u64 cap_id; /* unique cap id (mds provided) */
- union {
- /* in-use caps */
- struct {
- int issued; /* latest, from the mds */
- int implemented; /* implemented superset of
- issued (for revocation) */
- int mds; /* mds index for this cap */
- int mds_wanted; /* caps wanted from this mds */
- };
- /* caps to release */
- struct {
- u64 cap_ino;
- int queue_release;
- };
- };
- u32 seq, issue_seq, mseq;
- u32 cap_gen; /* active/stale cycle */
- unsigned long last_used;
- struct list_head caps_item;
- };
- #define CHECK_CAPS_AUTHONLY 1 /* only check auth cap */
- #define CHECK_CAPS_FLUSH 2 /* flush any dirty caps */
- #define CHECK_CAPS_NOINVAL 4 /* don't invalidate pagecache */
- struct ceph_cap_flush {
- u64 tid;
- int caps;
- bool wake; /* wake up flush waiters when finish ? */
- bool is_capsnap; /* true means capsnap */
- struct list_head g_list; // global
- struct list_head i_list; // per inode
- };
- /*
- * Snapped cap state that is pending flush to mds. When a snapshot occurs,
- * we first complete any in-process sync writes and writeback any dirty
- * data before flushing the snapped state (tracked here) back to the MDS.
- */
- struct ceph_cap_snap {
- refcount_t nref;
- struct list_head ci_item;
- struct ceph_cap_flush cap_flush;
- u64 follows;
- int issued, dirty;
- struct ceph_snap_context *context;
- umode_t mode;
- kuid_t uid;
- kgid_t gid;
- struct ceph_buffer *xattr_blob;
- u64 xattr_version;
- u64 size;
- u64 change_attr;
- struct timespec64 mtime, atime, ctime, btime;
- u64 time_warp_seq;
- u64 truncate_size;
- u32 truncate_seq;
- int writing; /* a sync write is still in progress */
- int dirty_pages; /* dirty pages awaiting writeback */
- bool inline_data;
- bool need_flush;
- };
- static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap)
- {
- if (refcount_dec_and_test(&capsnap->nref)) {
- if (capsnap->xattr_blob)
- ceph_buffer_put(capsnap->xattr_blob);
- kmem_cache_free(ceph_cap_snap_cachep, capsnap);
- }
- }
- /*
- * The frag tree describes how a directory is fragmented, potentially across
- * multiple metadata servers. It is also used to indicate points where
- * metadata authority is delegated, and whether/where metadata is replicated.
- *
- * A _leaf_ frag will be present in the i_fragtree IFF there is
- * delegation info. That is, if mds >= 0 || ndist > 0.
- */
- #define CEPH_MAX_DIRFRAG_REP 4
- struct ceph_inode_frag {
- struct rb_node node;
- /* fragtree state */
- u32 frag;
- int split_by; /* i.e. 2^(split_by) children */
- /* delegation and replication info */
- int mds; /* -1 if same authority as parent */
- int ndist; /* >0 if replicated */
- int dist[CEPH_MAX_DIRFRAG_REP];
- };
- /*
- * We cache inode xattrs as an encoded blob until they are first used,
- * at which point we parse them into an rbtree.
- */
- struct ceph_inode_xattr {
- struct rb_node node;
- const char *name;
- int name_len;
- const char *val;
- int val_len;
- int dirty;
- int should_free_name;
- int should_free_val;
- };
- /*
- * Ceph dentry state
- */
- struct ceph_dentry_info {
- struct dentry *dentry;
- struct ceph_mds_session *lease_session;
- struct list_head lease_list;
- struct hlist_node hnode;
- unsigned long flags;
- int lease_shared_gen;
- u32 lease_gen;
- u32 lease_seq;
- unsigned long lease_renew_after, lease_renew_from;
- unsigned long time;
- u64 offset;
- };
- #define CEPH_DENTRY_REFERENCED (1 << 0)
- #define CEPH_DENTRY_LEASE_LIST (1 << 1)
- #define CEPH_DENTRY_SHRINK_LIST (1 << 2)
- #define CEPH_DENTRY_PRIMARY_LINK (1 << 3)
- #define CEPH_DENTRY_ASYNC_UNLINK_BIT (4)
- #define CEPH_DENTRY_ASYNC_UNLINK (1 << CEPH_DENTRY_ASYNC_UNLINK_BIT)
- #define CEPH_DENTRY_ASYNC_CREATE_BIT (5)
- #define CEPH_DENTRY_ASYNC_CREATE (1 << CEPH_DENTRY_ASYNC_CREATE_BIT)
- struct ceph_inode_xattrs_info {
- /*
- * (still encoded) xattr blob. we avoid the overhead of parsing
- * this until someone actually calls getxattr, etc.
- *
- * blob->vec.iov_len == 4 implies there are no xattrs; blob ==
- * NULL means we don't know.
- */
- struct ceph_buffer *blob, *prealloc_blob;
- struct rb_root index;
- bool dirty;
- int count;
- int names_size;
- int vals_size;
- u64 version, index_version;
- };
- /*
- * Ceph inode.
- */
- struct ceph_inode_info {
- struct netfs_inode netfs; /* Netfslib context and vfs inode */
- struct ceph_vino i_vino; /* ceph ino + snap */
- spinlock_t i_ceph_lock;
- u64 i_version;
- u64 i_inline_version;
- u32 i_time_warp_seq;
- unsigned long i_ceph_flags;
- atomic64_t i_release_count;
- atomic64_t i_ordered_count;
- atomic64_t i_complete_seq[2];
- struct ceph_dir_layout i_dir_layout;
- struct ceph_file_layout i_layout;
- struct ceph_file_layout i_cached_layout; // for async creates
- char *i_symlink;
- /* for dirs */
- struct timespec64 i_rctime;
- u64 i_rbytes, i_rfiles, i_rsubdirs, i_rsnaps;
- u64 i_files, i_subdirs;
- /* quotas */
- u64 i_max_bytes, i_max_files;
- s32 i_dir_pin;
- struct rb_root i_fragtree;
- int i_fragtree_nsplits;
- struct mutex i_fragtree_mutex;
- struct ceph_inode_xattrs_info i_xattrs;
- /* capabilities. protected _both_ by i_ceph_lock and cap->session's
- * s_mutex. */
- struct rb_root i_caps; /* cap list */
- struct ceph_cap *i_auth_cap; /* authoritative cap, if any */
- unsigned i_dirty_caps, i_flushing_caps; /* mask of dirtied fields */
- /*
- * Link to the auth cap's session's s_cap_dirty list. s_cap_dirty
- * is protected by the mdsc->cap_dirty_lock, but each individual item
- * is also protected by the inode's i_ceph_lock. Walking s_cap_dirty
- * requires the mdsc->cap_dirty_lock. List presence for an item can
- * be tested under the i_ceph_lock. Changing anything requires both.
- */
- struct list_head i_dirty_item;
- /*
- * Link to session's s_cap_flushing list. Protected in a similar
- * fashion to i_dirty_item, but also by the s_mutex for changes. The
- * s_cap_flushing list can be walked while holding either the s_mutex
- * or msdc->cap_dirty_lock. List presence can also be checked while
- * holding the i_ceph_lock for this inode.
- */
- struct list_head i_flushing_item;
- /* we need to track cap writeback on a per-cap-bit basis, to allow
- * overlapping, pipelined cap flushes to the mds. we can probably
- * reduce the tid to 8 bits if we're concerned about inode size. */
- struct ceph_cap_flush *i_prealloc_cap_flush;
- struct list_head i_cap_flush_list;
- wait_queue_head_t i_cap_wq; /* threads waiting on a capability */
- unsigned long i_hold_caps_max; /* jiffies */
- struct list_head i_cap_delay_list; /* for delayed cap release to mds */
- struct ceph_cap_reservation i_cap_migration_resv;
- struct list_head i_cap_snaps; /* snapped state pending flush to mds */
- struct ceph_snap_context *i_head_snapc; /* set if wr_buffer_head > 0 or
- dirty|flushing caps */
- unsigned i_snap_caps; /* cap bits for snapped files */
- unsigned long i_last_rd;
- unsigned long i_last_wr;
- int i_nr_by_mode[CEPH_FILE_MODE_BITS]; /* open file counts */
- struct mutex i_truncate_mutex;
- u32 i_truncate_seq; /* last truncate to smaller size */
- u64 i_truncate_size; /* and the size we last truncated down to */
- int i_truncate_pending; /* still need to call vmtruncate */
- u64 i_max_size; /* max file size authorized by mds */
- u64 i_reported_size; /* (max_)size reported to or requested of mds */
- u64 i_wanted_max_size; /* offset we'd like to write too */
- u64 i_requested_max_size; /* max_size we've requested */
- /* held references to caps */
- int i_pin_ref;
- int i_rd_ref, i_rdcache_ref, i_wr_ref, i_wb_ref, i_fx_ref;
- int i_wrbuffer_ref, i_wrbuffer_ref_head;
- atomic_t i_filelock_ref;
- atomic_t i_shared_gen; /* increment each time we get FILE_SHARED */
- u32 i_rdcache_gen; /* incremented each time we get FILE_CACHE. */
- u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */
- struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */
- struct list_head i_unsafe_iops; /* uncommitted mds inode ops */
- spinlock_t i_unsafe_lock;
- union {
- struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */
- struct ceph_snapid_map *i_snapid_map; /* snapid -> dev_t */
- };
- struct list_head i_snap_realm_item;
- struct list_head i_snap_flush_item;
- struct timespec64 i_btime;
- struct timespec64 i_snap_btime;
- struct work_struct i_work;
- unsigned long i_work_mask;
- };
- struct ceph_netfs_request_data {
- int caps;
- /*
- * Maximum size of a file readahead request.
- * The fadvise could update the bdi's default ra_pages.
- */
- unsigned int file_ra_pages;
- /* Set it if fadvise disables file readahead entirely */
- bool file_ra_disabled;
- };
- static inline struct ceph_inode_info *
- ceph_inode(const struct inode *inode)
- {
- return container_of(inode, struct ceph_inode_info, netfs.inode);
- }
- static inline struct ceph_fs_client *
- ceph_inode_to_client(const struct inode *inode)
- {
- return (struct ceph_fs_client *)inode->i_sb->s_fs_info;
- }
- static inline struct ceph_fs_client *
- ceph_sb_to_client(const struct super_block *sb)
- {
- return (struct ceph_fs_client *)sb->s_fs_info;
- }
- static inline struct ceph_mds_client *
- ceph_sb_to_mdsc(const struct super_block *sb)
- {
- return (struct ceph_mds_client *)ceph_sb_to_client(sb)->mdsc;
- }
- static inline struct ceph_vino
- ceph_vino(const struct inode *inode)
- {
- return ceph_inode(inode)->i_vino;
- }
- static inline u32 ceph_ino_to_ino32(u64 vino)
- {
- u32 ino = vino & 0xffffffff;
- ino ^= vino >> 32;
- if (!ino)
- ino = 2;
- return ino;
- }
- /*
- * Inode numbers in cephfs are 64 bits, but inode->i_ino is 32-bits on
- * some arches. We generally do not use this value inside the ceph driver, but
- * we do want to set it to something, so that generic vfs code has an
- * appropriate value for tracepoints and the like.
- */
- static inline ino_t ceph_vino_to_ino_t(struct ceph_vino vino)
- {
- if (sizeof(ino_t) == sizeof(u32))
- return ceph_ino_to_ino32(vino.ino);
- return (ino_t)vino.ino;
- }
- /* for printf-style formatting */
- #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap
- static inline u64 ceph_ino(struct inode *inode)
- {
- return ceph_inode(inode)->i_vino.ino;
- }
- static inline u64 ceph_snap(struct inode *inode)
- {
- return ceph_inode(inode)->i_vino.snap;
- }
- /**
- * ceph_present_ino - format an inode number for presentation to userland
- * @sb: superblock where the inode lives
- * @ino: inode number to (possibly) convert
- *
- * If the user mounted with the ino32 option, then the 64-bit value needs
- * to be converted to something that can fit inside 32 bits. Note that
- * internal kernel code never uses this value, so this is entirely for
- * userland consumption.
- */
- static inline u64 ceph_present_ino(struct super_block *sb, u64 ino)
- {
- if (unlikely(ceph_test_mount_opt(ceph_sb_to_client(sb), INO32)))
- return ceph_ino_to_ino32(ino);
- return ino;
- }
- static inline u64 ceph_present_inode(struct inode *inode)
- {
- return ceph_present_ino(inode->i_sb, ceph_ino(inode));
- }
- static inline int ceph_ino_compare(struct inode *inode, void *data)
- {
- struct ceph_vino *pvino = (struct ceph_vino *)data;
- struct ceph_inode_info *ci = ceph_inode(inode);
- return ci->i_vino.ino == pvino->ino &&
- ci->i_vino.snap == pvino->snap;
- }
- /*
- * The MDS reserves a set of inodes for its own usage. These should never
- * be accessible by clients, and so the MDS has no reason to ever hand these
- * out. The range is CEPH_MDS_INO_MDSDIR_OFFSET..CEPH_INO_SYSTEM_BASE.
- *
- * These come from src/mds/mdstypes.h in the ceph sources.
- */
- #define CEPH_MAX_MDS 0x100
- #define CEPH_NUM_STRAY 10
- #define CEPH_MDS_INO_MDSDIR_OFFSET (1 * CEPH_MAX_MDS)
- #define CEPH_MDS_INO_LOG_OFFSET (2 * CEPH_MAX_MDS)
- #define CEPH_INO_SYSTEM_BASE ((6*CEPH_MAX_MDS) + (CEPH_MAX_MDS * CEPH_NUM_STRAY))
- static inline bool ceph_vino_is_reserved(const struct ceph_vino vino)
- {
- if (vino.ino >= CEPH_INO_SYSTEM_BASE ||
- vino.ino < CEPH_MDS_INO_MDSDIR_OFFSET)
- return false;
- /* Don't warn on mdsdirs */
- WARN_RATELIMIT(vino.ino >= CEPH_MDS_INO_LOG_OFFSET,
- "Attempt to access reserved inode number 0x%llx",
- vino.ino);
- return true;
- }
- static inline struct inode *ceph_find_inode(struct super_block *sb,
- struct ceph_vino vino)
- {
- if (ceph_vino_is_reserved(vino))
- return NULL;
- /*
- * NB: The hashval will be run through the fs/inode.c hash function
- * anyway, so there is no need to squash the inode number down to
- * 32-bits first. Just use low-order bits on arches with 32-bit long.
- */
- return ilookup5(sb, (unsigned long)vino.ino, ceph_ino_compare, &vino);
- }
- /*
- * Ceph inode.
- */
- #define CEPH_I_DIR_ORDERED (1 << 0) /* dentries in dir are ordered */
- #define CEPH_I_FLUSH (1 << 2) /* do not delay flush of dirty metadata */
- #define CEPH_I_POOL_PERM (1 << 3) /* pool rd/wr bits are valid */
- #define CEPH_I_POOL_RD (1 << 4) /* can read from pool */
- #define CEPH_I_POOL_WR (1 << 5) /* can write to pool */
- #define CEPH_I_SEC_INITED (1 << 6) /* security initialized */
- #define CEPH_I_KICK_FLUSH (1 << 7) /* kick flushing caps */
- #define CEPH_I_FLUSH_SNAPS (1 << 8) /* need flush snapss */
- #define CEPH_I_ERROR_WRITE (1 << 9) /* have seen write errors */
- #define CEPH_I_ERROR_FILELOCK (1 << 10) /* have seen file lock errors */
- #define CEPH_I_ODIRECT (1 << 11) /* inode in direct I/O mode */
- #define CEPH_ASYNC_CREATE_BIT (12) /* async create in flight for this */
- #define CEPH_I_ASYNC_CREATE (1 << CEPH_ASYNC_CREATE_BIT)
- #define CEPH_I_SHUTDOWN (1 << 13) /* inode is no longer usable */
- /*
- * Masks of ceph inode work.
- */
- #define CEPH_I_WORK_WRITEBACK 0
- #define CEPH_I_WORK_INVALIDATE_PAGES 1
- #define CEPH_I_WORK_VMTRUNCATE 2
- #define CEPH_I_WORK_CHECK_CAPS 3
- #define CEPH_I_WORK_FLUSH_SNAPS 4
- /*
- * We set the ERROR_WRITE bit when we start seeing write errors on an inode
- * and then clear it when they start succeeding. Note that we do a lockless
- * check first, and only take the lock if it looks like it needs to be changed.
- * The write submission code just takes this as a hint, so we're not too
- * worried if a few slip through in either direction.
- */
- static inline void ceph_set_error_write(struct ceph_inode_info *ci)
- {
- if (!(READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE)) {
- spin_lock(&ci->i_ceph_lock);
- ci->i_ceph_flags |= CEPH_I_ERROR_WRITE;
- spin_unlock(&ci->i_ceph_lock);
- }
- }
- static inline void ceph_clear_error_write(struct ceph_inode_info *ci)
- {
- if (READ_ONCE(ci->i_ceph_flags) & CEPH_I_ERROR_WRITE) {
- spin_lock(&ci->i_ceph_lock);
- ci->i_ceph_flags &= ~CEPH_I_ERROR_WRITE;
- spin_unlock(&ci->i_ceph_lock);
- }
- }
- static inline void __ceph_dir_set_complete(struct ceph_inode_info *ci,
- long long release_count,
- long long ordered_count)
- {
- /*
- * Makes sure operations that setup readdir cache (update page
- * cache and i_size) are strongly ordered w.r.t. the following
- * atomic64_set() operations.
- */
- smp_mb();
- atomic64_set(&ci->i_complete_seq[0], release_count);
- atomic64_set(&ci->i_complete_seq[1], ordered_count);
- }
- static inline void __ceph_dir_clear_complete(struct ceph_inode_info *ci)
- {
- atomic64_inc(&ci->i_release_count);
- }
- static inline void __ceph_dir_clear_ordered(struct ceph_inode_info *ci)
- {
- atomic64_inc(&ci->i_ordered_count);
- }
- static inline bool __ceph_dir_is_complete(struct ceph_inode_info *ci)
- {
- return atomic64_read(&ci->i_complete_seq[0]) ==
- atomic64_read(&ci->i_release_count);
- }
- static inline bool __ceph_dir_is_complete_ordered(struct ceph_inode_info *ci)
- {
- return atomic64_read(&ci->i_complete_seq[0]) ==
- atomic64_read(&ci->i_release_count) &&
- atomic64_read(&ci->i_complete_seq[1]) ==
- atomic64_read(&ci->i_ordered_count);
- }
- static inline void ceph_dir_clear_complete(struct inode *inode)
- {
- __ceph_dir_clear_complete(ceph_inode(inode));
- }
- static inline void ceph_dir_clear_ordered(struct inode *inode)
- {
- __ceph_dir_clear_ordered(ceph_inode(inode));
- }
- static inline bool ceph_dir_is_complete_ordered(struct inode *inode)
- {
- bool ret = __ceph_dir_is_complete_ordered(ceph_inode(inode));
- smp_rmb();
- return ret;
- }
- /* find a specific frag @f */
- extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci,
- u32 f);
- /*
- * choose fragment for value @v. copy frag content to pfrag, if leaf
- * exists
- */
- extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
- struct ceph_inode_frag *pfrag,
- int *found);
- static inline struct ceph_dentry_info *ceph_dentry(const struct dentry *dentry)
- {
- return (struct ceph_dentry_info *)dentry->d_fsdata;
- }
- /*
- * caps helpers
- */
- static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci)
- {
- return !RB_EMPTY_ROOT(&ci->i_caps);
- }
- extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented);
- extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t);
- extern int __ceph_caps_issued_mask_metric(struct ceph_inode_info *ci, int mask,
- int t);
- extern int __ceph_caps_issued_other(struct ceph_inode_info *ci,
- struct ceph_cap *cap);
- static inline int ceph_caps_issued(struct ceph_inode_info *ci)
- {
- int issued;
- spin_lock(&ci->i_ceph_lock);
- issued = __ceph_caps_issued(ci, NULL);
- spin_unlock(&ci->i_ceph_lock);
- return issued;
- }
- static inline int ceph_caps_issued_mask_metric(struct ceph_inode_info *ci,
- int mask, int touch)
- {
- int r;
- spin_lock(&ci->i_ceph_lock);
- r = __ceph_caps_issued_mask_metric(ci, mask, touch);
- spin_unlock(&ci->i_ceph_lock);
- return r;
- }
- static inline int __ceph_caps_dirty(struct ceph_inode_info *ci)
- {
- return ci->i_dirty_caps | ci->i_flushing_caps;
- }
- extern struct ceph_cap_flush *ceph_alloc_cap_flush(void);
- extern void ceph_free_cap_flush(struct ceph_cap_flush *cf);
- extern int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask,
- struct ceph_cap_flush **pcf);
- extern int __ceph_caps_revoking_other(struct ceph_inode_info *ci,
- struct ceph_cap *ocap, int mask);
- extern int ceph_caps_revoking(struct ceph_inode_info *ci, int mask);
- extern int __ceph_caps_used(struct ceph_inode_info *ci);
- static inline bool __ceph_is_file_opened(struct ceph_inode_info *ci)
- {
- return ci->i_nr_by_mode[0];
- }
- extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci);
- extern int __ceph_caps_wanted(struct ceph_inode_info *ci);
- /* what the mds thinks we want */
- extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci, bool check);
- extern void ceph_caps_init(struct ceph_mds_client *mdsc);
- extern void ceph_caps_finalize(struct ceph_mds_client *mdsc);
- extern void ceph_adjust_caps_max_min(struct ceph_mds_client *mdsc,
- struct ceph_mount_options *fsopt);
- extern int ceph_reserve_caps(struct ceph_mds_client *mdsc,
- struct ceph_cap_reservation *ctx, int need);
- extern void ceph_unreserve_caps(struct ceph_mds_client *mdsc,
- struct ceph_cap_reservation *ctx);
- extern void ceph_reservation_status(struct ceph_fs_client *client,
- int *total, int *avail, int *used,
- int *reserved, int *min);
- extern void change_auth_cap_ses(struct ceph_inode_info *ci,
- struct ceph_mds_session *session);
- /*
- * we keep buffered readdir results attached to file->private_data
- */
- #define CEPH_F_SYNC 1
- #define CEPH_F_ATEND 2
- struct ceph_file_info {
- short fmode; /* initialized on open */
- short flags; /* CEPH_F_* */
- spinlock_t rw_contexts_lock;
- struct list_head rw_contexts;
- u32 filp_gen;
- };
- struct ceph_dir_file_info {
- struct ceph_file_info file_info;
- /* readdir: position within the dir */
- u32 frag;
- struct ceph_mds_request *last_readdir;
- /* readdir: position within a frag */
- unsigned next_offset; /* offset of next chunk (last_name's + 1) */
- char *last_name; /* last entry in previous chunk */
- long long dir_release_count;
- long long dir_ordered_count;
- int readdir_cache_idx;
- /* used for -o dirstat read() on directory thing */
- char *dir_info;
- int dir_info_len;
- };
- struct ceph_rw_context {
- struct list_head list;
- struct task_struct *thread;
- int caps;
- };
- #define CEPH_DEFINE_RW_CONTEXT(_name, _caps) \
- struct ceph_rw_context _name = { \
- .thread = current, \
- .caps = _caps, \
- }
- static inline void ceph_add_rw_context(struct ceph_file_info *cf,
- struct ceph_rw_context *ctx)
- {
- spin_lock(&cf->rw_contexts_lock);
- list_add(&ctx->list, &cf->rw_contexts);
- spin_unlock(&cf->rw_contexts_lock);
- }
- static inline void ceph_del_rw_context(struct ceph_file_info *cf,
- struct ceph_rw_context *ctx)
- {
- spin_lock(&cf->rw_contexts_lock);
- list_del(&ctx->list);
- spin_unlock(&cf->rw_contexts_lock);
- }
- static inline struct ceph_rw_context*
- ceph_find_rw_context(struct ceph_file_info *cf)
- {
- struct ceph_rw_context *ctx, *found = NULL;
- spin_lock(&cf->rw_contexts_lock);
- list_for_each_entry(ctx, &cf->rw_contexts, list) {
- if (ctx->thread == current) {
- found = ctx;
- break;
- }
- }
- spin_unlock(&cf->rw_contexts_lock);
- return found;
- }
- struct ceph_readdir_cache_control {
- struct page *page;
- struct dentry **dentries;
- int index;
- };
- /*
- * A "snap realm" describes a subset of the file hierarchy sharing
- * the same set of snapshots that apply to it. The realms themselves
- * are organized into a hierarchy, such that children inherit (some of)
- * the snapshots of their parents.
- *
- * All inodes within the realm that have capabilities are linked into a
- * per-realm list.
- */
- struct ceph_snap_realm {
- u64 ino;
- struct inode *inode;
- atomic_t nref;
- struct rb_node node;
- u64 created, seq;
- u64 parent_ino;
- u64 parent_since; /* snapid when our current parent became so */
- u64 *prior_parent_snaps; /* snaps inherited from any parents we */
- u32 num_prior_parent_snaps; /* had prior to parent_since */
- u64 *snaps; /* snaps specific to this realm */
- u32 num_snaps;
- struct ceph_snap_realm *parent;
- struct list_head children; /* list of child realms */
- struct list_head child_item;
- struct list_head empty_item; /* if i have ref==0 */
- struct list_head dirty_item; /* if realm needs new context */
- struct list_head rebuild_item; /* rebuild snap realms _downward_ in hierarchy */
- /* the current set of snaps for this realm */
- struct ceph_snap_context *cached_context;
- struct list_head inodes_with_caps;
- spinlock_t inodes_with_caps_lock;
- };
- static inline int default_congestion_kb(void)
- {
- int congestion_kb;
- /*
- * Copied from NFS
- *
- * congestion size, scale with available memory.
- *
- * 64MB: 8192k
- * 128MB: 11585k
- * 256MB: 16384k
- * 512MB: 23170k
- * 1GB: 32768k
- * 2GB: 46340k
- * 4GB: 65536k
- * 8GB: 92681k
- * 16GB: 131072k
- *
- * This allows larger machines to have larger/more transfers.
- * Limit the default to 256M
- */
- congestion_kb = (16*int_sqrt(totalram_pages())) << (PAGE_SHIFT-10);
- if (congestion_kb > 256*1024)
- congestion_kb = 256*1024;
- return congestion_kb;
- }
- /* super.c */
- extern int ceph_force_reconnect(struct super_block *sb);
- /* snap.c */
- struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc,
- u64 ino);
- extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc,
- struct ceph_snap_realm *realm);
- extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc,
- struct ceph_snap_realm *realm);
- extern int ceph_update_snap_trace(struct ceph_mds_client *m,
- void *p, void *e, bool deletion,
- struct ceph_snap_realm **realm_ret);
- void ceph_change_snap_realm(struct inode *inode, struct ceph_snap_realm *realm);
- extern void ceph_handle_snap(struct ceph_mds_client *mdsc,
- struct ceph_mds_session *session,
- struct ceph_msg *msg);
- extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci,
- struct ceph_cap_snap *capsnap);
- extern void ceph_cleanup_global_and_empty_realms(struct ceph_mds_client *mdsc);
- extern struct ceph_snapid_map *ceph_get_snapid_map(struct ceph_mds_client *mdsc,
- u64 snap);
- extern void ceph_put_snapid_map(struct ceph_mds_client* mdsc,
- struct ceph_snapid_map *sm);
- extern void ceph_trim_snapid_map(struct ceph_mds_client *mdsc);
- extern void ceph_cleanup_snapid_map(struct ceph_mds_client *mdsc);
- void ceph_umount_begin(struct super_block *sb);
- /*
- * a cap_snap is "pending" if it is still awaiting an in-progress
- * sync write (that may/may not still update size, mtime, etc.).
- */
- static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci)
- {
- return !list_empty(&ci->i_cap_snaps) &&
- list_last_entry(&ci->i_cap_snaps, struct ceph_cap_snap,
- ci_item)->writing;
- }
- /* inode.c */
- struct ceph_mds_reply_info_in;
- struct ceph_mds_reply_dirfrag;
- extern const struct inode_operations ceph_file_iops;
- extern struct inode *ceph_alloc_inode(struct super_block *sb);
- extern void ceph_evict_inode(struct inode *inode);
- extern void ceph_free_inode(struct inode *inode);
- extern struct inode *ceph_get_inode(struct super_block *sb,
- struct ceph_vino vino);
- extern struct inode *ceph_get_snapdir(struct inode *parent);
- extern int ceph_fill_file_size(struct inode *inode, int issued,
- u32 truncate_seq, u64 truncate_size, u64 size);
- extern void ceph_fill_file_time(struct inode *inode, int issued,
- u64 time_warp_seq, struct timespec64 *ctime,
- struct timespec64 *mtime,
- struct timespec64 *atime);
- extern int ceph_fill_inode(struct inode *inode, struct page *locked_page,
- struct ceph_mds_reply_info_in *iinfo,
- struct ceph_mds_reply_dirfrag *dirinfo,
- struct ceph_mds_session *session, int cap_fmode,
- struct ceph_cap_reservation *caps_reservation);
- extern int ceph_fill_trace(struct super_block *sb,
- struct ceph_mds_request *req);
- extern int ceph_readdir_prepopulate(struct ceph_mds_request *req,
- struct ceph_mds_session *session);
- extern int ceph_inode_holds_cap(struct inode *inode, int mask);
- extern bool ceph_inode_set_size(struct inode *inode, loff_t size);
- extern void __ceph_do_pending_vmtruncate(struct inode *inode);
- void ceph_queue_inode_work(struct inode *inode, int work_bit);
- static inline void ceph_queue_vmtruncate(struct inode *inode)
- {
- ceph_queue_inode_work(inode, CEPH_I_WORK_VMTRUNCATE);
- }
- static inline void ceph_queue_invalidate(struct inode *inode)
- {
- ceph_queue_inode_work(inode, CEPH_I_WORK_INVALIDATE_PAGES);
- }
- static inline void ceph_queue_writeback(struct inode *inode)
- {
- ceph_queue_inode_work(inode, CEPH_I_WORK_WRITEBACK);
- }
- static inline void ceph_queue_check_caps(struct inode *inode)
- {
- ceph_queue_inode_work(inode, CEPH_I_WORK_CHECK_CAPS);
- }
- static inline void ceph_queue_flush_snaps(struct inode *inode)
- {
- ceph_queue_inode_work(inode, CEPH_I_WORK_FLUSH_SNAPS);
- }
- extern int ceph_try_to_choose_auth_mds(struct inode *inode, int mask);
- extern int __ceph_do_getattr(struct inode *inode, struct page *locked_page,
- int mask, bool force);
- static inline int ceph_do_getattr(struct inode *inode, int mask, bool force)
- {
- return __ceph_do_getattr(inode, NULL, mask, force);
- }
- extern int ceph_permission(struct user_namespace *mnt_userns,
- struct inode *inode, int mask);
- extern int __ceph_setattr(struct inode *inode, struct iattr *attr);
- extern int ceph_setattr(struct user_namespace *mnt_userns,
- struct dentry *dentry, struct iattr *attr);
- extern int ceph_getattr(struct user_namespace *mnt_userns,
- const struct path *path, struct kstat *stat,
- u32 request_mask, unsigned int flags);
- void ceph_inode_shutdown(struct inode *inode);
- static inline bool ceph_inode_is_shutdown(struct inode *inode)
- {
- unsigned long flags = READ_ONCE(ceph_inode(inode)->i_ceph_flags);
- struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
- int state = READ_ONCE(fsc->mount_state);
- return (flags & CEPH_I_SHUTDOWN) || state >= CEPH_MOUNT_SHUTDOWN;
- }
- /* xattr.c */
- int __ceph_setxattr(struct inode *, const char *, const void *, size_t, int);
- int ceph_do_getvxattr(struct inode *inode, const char *name, void *value, size_t size);
- ssize_t __ceph_getxattr(struct inode *, const char *, void *, size_t);
- extern ssize_t ceph_listxattr(struct dentry *, char *, size_t);
- extern struct ceph_buffer *__ceph_build_xattrs_blob(struct ceph_inode_info *ci);
- extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci);
- extern const struct xattr_handler *ceph_xattr_handlers[];
- struct ceph_acl_sec_ctx {
- #ifdef CONFIG_CEPH_FS_POSIX_ACL
- void *default_acl;
- void *acl;
- #endif
- #ifdef CONFIG_CEPH_FS_SECURITY_LABEL
- void *sec_ctx;
- u32 sec_ctxlen;
- #endif
- struct ceph_pagelist *pagelist;
- };
- #ifdef CONFIG_SECURITY
- extern bool ceph_security_xattr_deadlock(struct inode *in);
- extern bool ceph_security_xattr_wanted(struct inode *in);
- #else
- static inline bool ceph_security_xattr_deadlock(struct inode *in)
- {
- return false;
- }
- static inline bool ceph_security_xattr_wanted(struct inode *in)
- {
- return false;
- }
- #endif
- #ifdef CONFIG_CEPH_FS_SECURITY_LABEL
- extern int ceph_security_init_secctx(struct dentry *dentry, umode_t mode,
- struct ceph_acl_sec_ctx *ctx);
- static inline void ceph_security_invalidate_secctx(struct inode *inode)
- {
- security_inode_invalidate_secctx(inode);
- }
- #else
- static inline int ceph_security_init_secctx(struct dentry *dentry, umode_t mode,
- struct ceph_acl_sec_ctx *ctx)
- {
- return 0;
- }
- static inline void ceph_security_invalidate_secctx(struct inode *inode)
- {
- }
- #endif
- void ceph_release_acl_sec_ctx(struct ceph_acl_sec_ctx *as_ctx);
- /* acl.c */
- #ifdef CONFIG_CEPH_FS_POSIX_ACL
- struct posix_acl *ceph_get_acl(struct inode *, int, bool);
- int ceph_set_acl(struct user_namespace *mnt_userns,
- struct inode *inode, struct posix_acl *acl, int type);
- int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
- struct ceph_acl_sec_ctx *as_ctx);
- void ceph_init_inode_acls(struct inode *inode,
- struct ceph_acl_sec_ctx *as_ctx);
- static inline void ceph_forget_all_cached_acls(struct inode *inode)
- {
- forget_all_cached_acls(inode);
- }
- #else
- #define ceph_get_acl NULL
- #define ceph_set_acl NULL
- static inline int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
- struct ceph_acl_sec_ctx *as_ctx)
- {
- return 0;
- }
- static inline void ceph_init_inode_acls(struct inode *inode,
- struct ceph_acl_sec_ctx *as_ctx)
- {
- }
- static inline int ceph_acl_chmod(struct dentry *dentry, struct inode *inode)
- {
- return 0;
- }
- static inline void ceph_forget_all_cached_acls(struct inode *inode)
- {
- }
- #endif
- /* caps.c */
- extern const char *ceph_cap_string(int c);
- extern void ceph_handle_caps(struct ceph_mds_session *session,
- struct ceph_msg *msg);
- extern struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc,
- struct ceph_cap_reservation *ctx);
- extern void ceph_add_cap(struct inode *inode,
- struct ceph_mds_session *session, u64 cap_id,
- unsigned issued, unsigned wanted,
- unsigned cap, unsigned seq, u64 realmino, int flags,
- struct ceph_cap **new_cap);
- extern void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release);
- extern void ceph_remove_cap(struct ceph_cap *cap, bool queue_release);
- extern void __ceph_remove_caps(struct ceph_inode_info *ci);
- extern void ceph_put_cap(struct ceph_mds_client *mdsc,
- struct ceph_cap *cap);
- extern int ceph_is_any_caps(struct inode *inode);
- extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc);
- extern int ceph_fsync(struct file *file, loff_t start, loff_t end,
- int datasync);
- extern void ceph_early_kick_flushing_caps(struct ceph_mds_client *mdsc,
- struct ceph_mds_session *session);
- extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc,
- struct ceph_mds_session *session);
- void ceph_kick_flushing_inode_caps(struct ceph_mds_session *session,
- struct ceph_inode_info *ci);
- extern struct ceph_cap *__get_cap_for_mds(struct ceph_inode_info *ci,
- int mds);
- extern struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci,
- int mds);
- extern void ceph_take_cap_refs(struct ceph_inode_info *ci, int caps,
- bool snap_rwsem_locked);
- extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps);
- extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had);
- extern void ceph_put_cap_refs_async(struct ceph_inode_info *ci, int had);
- extern void ceph_put_cap_refs_no_check_caps(struct ceph_inode_info *ci,
- int had);
- extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr,
- struct ceph_snap_context *snapc);
- extern void __ceph_remove_capsnap(struct inode *inode,
- struct ceph_cap_snap *capsnap,
- bool *wake_ci, bool *wake_mdsc);
- extern void ceph_remove_capsnap(struct inode *inode,
- struct ceph_cap_snap *capsnap,
- bool *wake_ci, bool *wake_mdsc);
- extern void ceph_flush_snaps(struct ceph_inode_info *ci,
- struct ceph_mds_session **psession);
- extern bool __ceph_should_report_size(struct ceph_inode_info *ci);
- extern void ceph_check_caps(struct ceph_inode_info *ci, int flags,
- struct ceph_mds_session *session);
- extern unsigned long ceph_check_delayed_caps(struct ceph_mds_client *mdsc);
- extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc);
- extern int ceph_drop_caps_for_unlink(struct inode *inode);
- extern int ceph_encode_inode_release(void **p, struct inode *inode,
- int mds, int drop, int unless, int force);
- extern int ceph_encode_dentry_release(void **p, struct dentry *dn,
- struct inode *dir,
- int mds, int drop, int unless);
- extern int ceph_get_caps(struct file *filp, int need, int want,
- loff_t endoff, int *got);
- extern int ceph_try_get_caps(struct inode *inode,
- int need, int want, bool nonblock, int *got);
- /* for counting open files by mode */
- extern void ceph_get_fmode(struct ceph_inode_info *ci, int mode, int count);
- extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode, int count);
- extern void __ceph_touch_fmode(struct ceph_inode_info *ci,
- struct ceph_mds_client *mdsc, int fmode);
- /* addr.c */
- extern const struct address_space_operations ceph_aops;
- extern const struct netfs_request_ops ceph_netfs_ops;
- extern int ceph_mmap(struct file *file, struct vm_area_struct *vma);
- extern int ceph_uninline_data(struct file *file);
- extern int ceph_pool_perm_check(struct inode *inode, int need);
- extern void ceph_pool_perm_destroy(struct ceph_mds_client* mdsc);
- int ceph_purge_inode_cap(struct inode *inode, struct ceph_cap *cap, bool *invalidate);
- static inline bool ceph_has_inline_data(struct ceph_inode_info *ci)
- {
- if (ci->i_inline_version == CEPH_INLINE_NONE ||
- ci->i_inline_version == 1) /* initial version, no data */
- return false;
- return true;
- }
- /* file.c */
- extern const struct file_operations ceph_file_fops;
- extern int ceph_renew_caps(struct inode *inode, int fmode);
- extern int ceph_open(struct inode *inode, struct file *file);
- extern int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
- struct file *file, unsigned flags, umode_t mode);
- extern int ceph_release(struct inode *inode, struct file *filp);
- extern void ceph_fill_inline_data(struct inode *inode, struct page *locked_page,
- char *data, size_t len);
- /* dir.c */
- extern const struct file_operations ceph_dir_fops;
- extern const struct file_operations ceph_snapdir_fops;
- extern const struct inode_operations ceph_dir_iops;
- extern const struct inode_operations ceph_snapdir_iops;
- extern const struct dentry_operations ceph_dentry_ops;
- extern loff_t ceph_make_fpos(unsigned high, unsigned off, bool hash_order);
- extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry);
- extern struct dentry *ceph_handle_snapdir(struct ceph_mds_request *req,
- struct dentry *dentry);
- extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req,
- struct dentry *dentry, int err);
- extern void __ceph_dentry_lease_touch(struct ceph_dentry_info *di);
- extern void __ceph_dentry_dir_lease_touch(struct ceph_dentry_info *di);
- extern void ceph_invalidate_dentry_lease(struct dentry *dentry);
- extern int ceph_trim_dentries(struct ceph_mds_client *mdsc);
- extern unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn);
- extern void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl);
- /* ioctl.c */
- extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
- /* export.c */
- extern const struct export_operations ceph_export_ops;
- struct inode *ceph_lookup_inode(struct super_block *sb, u64 ino);
- /* locks.c */
- extern __init void ceph_flock_init(void);
- extern int ceph_lock(struct file *file, int cmd, struct file_lock *fl);
- extern int ceph_flock(struct file *file, int cmd, struct file_lock *fl);
- extern void ceph_count_locks(struct inode *inode, int *p_num, int *f_num);
- extern int ceph_encode_locks_to_buffer(struct inode *inode,
- struct ceph_filelock *flocks,
- int num_fcntl_locks,
- int num_flock_locks);
- extern int ceph_locks_to_pagelist(struct ceph_filelock *flocks,
- struct ceph_pagelist *pagelist,
- int num_fcntl_locks, int num_flock_locks);
- /* debugfs.c */
- extern void ceph_fs_debugfs_init(struct ceph_fs_client *client);
- extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client);
- /* quota.c */
- enum quota_get_realm {
- QUOTA_GET_MAX_FILES,
- QUOTA_GET_MAX_BYTES,
- QUOTA_GET_ANY
- };
- static inline bool __ceph_has_quota(struct ceph_inode_info *ci,
- enum quota_get_realm which)
- {
- bool has_quota = false;
- switch (which) {
- case QUOTA_GET_MAX_BYTES:
- has_quota = !!ci->i_max_bytes;
- break;
- case QUOTA_GET_MAX_FILES:
- has_quota = !!ci->i_max_files;
- break;
- default:
- has_quota = !!(ci->i_max_files || ci->i_max_bytes);
- }
- return has_quota;
- }
- extern void ceph_adjust_quota_realms_count(struct inode *inode, bool inc);
- static inline void __ceph_update_quota(struct ceph_inode_info *ci,
- u64 max_bytes, u64 max_files)
- {
- bool had_quota, has_quota;
- had_quota = __ceph_has_quota(ci, QUOTA_GET_ANY);
- ci->i_max_bytes = max_bytes;
- ci->i_max_files = max_files;
- has_quota = __ceph_has_quota(ci, QUOTA_GET_ANY);
- if (had_quota != has_quota)
- ceph_adjust_quota_realms_count(&ci->netfs.inode, has_quota);
- }
- extern void ceph_handle_quota(struct ceph_mds_client *mdsc,
- struct ceph_mds_session *session,
- struct ceph_msg *msg);
- extern bool ceph_quota_is_max_files_exceeded(struct inode *inode);
- extern bool ceph_quota_is_same_realm(struct inode *old, struct inode *new);
- extern bool ceph_quota_is_max_bytes_exceeded(struct inode *inode,
- loff_t newlen);
- extern bool ceph_quota_is_max_bytes_approaching(struct inode *inode,
- loff_t newlen);
- extern bool ceph_quota_update_statfs(struct ceph_fs_client *fsc,
- struct kstatfs *buf);
- extern void ceph_cleanup_quotarealms_inodes(struct ceph_mds_client *mdsc);
- bool ceph_inc_mds_stopping_blocker(struct ceph_mds_client *mdsc,
- struct ceph_mds_session *session);
- void ceph_dec_mds_stopping_blocker(struct ceph_mds_client *mdsc);
- #endif /* _FS_CEPH_SUPER_H */
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