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-rw-r--r--fs/ceph/super.h946
1 files changed, 946 insertions, 0 deletions
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
new file mode 100644
index 000000000..fa20e1318
--- /dev/null
+++ b/fs/ceph/super.h
@@ -0,0 +1,946 @@
+#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/ceph/libceph.h>
+
+#ifdef CONFIG_CEPH_FSCACHE
+#include <linux/fscache.h>
+#endif
+
+/* f_type in struct statfs */
+#define CEPH_SUPER_MAGIC 0x00c36400
+
+/* 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_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_DEFAULT (CEPH_MOUNT_OPT_RBYTES | \
+ CEPH_MOUNT_OPT_DCACHE)
+
+#define ceph_set_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))
+
+#define CEPH_RSIZE_DEFAULT 0 /* max read size */
+#define CEPH_RASIZE_DEFAULT (8192*1024) /* readahead */
+#define CEPH_MAX_READDIR_DEFAULT 1024
+#define CEPH_MAX_READDIR_BYTES_DEFAULT (512*1024)
+#define CEPH_SNAPDIRNAME_DEFAULT ".snap"
+
+struct ceph_mount_options {
+ int flags;
+ int sb_flags;
+
+ int wsize; /* max write size */
+ int rsize; /* max read size */
+ int rasize; /* max readahead */
+ int congestion_kb; /* max writeback in flight */
+ int caps_wanted_delay_min, caps_wanted_delay_max;
+ int cap_release_safety;
+ int max_readdir; /* max readdir result (entires) */
+ int max_readdir_bytes; /* max readdir result (bytes) */
+
+ /*
+ * everything above this point can be memcmp'd; everything below
+ * is handled in compare_mount_options()
+ */
+
+ char *snapdir_name; /* default ".snap" */
+};
+
+struct ceph_fs_client {
+ struct super_block *sb;
+
+ struct ceph_mount_options *mount_options;
+ struct ceph_client *client;
+
+ unsigned long mount_state;
+ int min_caps; /* min caps i added */
+
+ struct ceph_mds_client *mdsc;
+
+ /* writeback */
+ mempool_t *wb_pagevec_pool;
+ struct workqueue_struct *wb_wq;
+ struct workqueue_struct *pg_inv_wq;
+ struct workqueue_struct *trunc_wq;
+ atomic_long_t writeback_count;
+
+ struct backing_dev_info backing_dev_info;
+
+#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_mds_sessions;
+#endif
+
+#ifdef CONFIG_CEPH_FSCACHE
+ struct fscache_cookie *fscache;
+ struct workqueue_struct *revalidate_wq;
+#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 */
+ int mds;
+ u64 cap_id; /* unique cap id (mds provided) */
+ int issued; /* latest, from the mds */
+ int implemented; /* implemented superset of issued (for revocation) */
+ int mds_wanted;
+ u32 seq, issue_seq, mseq;
+ u32 cap_gen; /* active/stale cycle */
+ unsigned long last_used;
+ struct list_head caps_item;
+};
+
+#define CHECK_CAPS_NODELAY 1 /* do not delay any further */
+#define CHECK_CAPS_AUTHONLY 2 /* only check auth cap */
+#define CHECK_CAPS_FLUSH 4 /* flush any dirty caps */
+
+/*
+ * 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 {
+ atomic_t nref;
+ struct ceph_inode_info *ci;
+ struct list_head ci_item, flushing_item;
+
+ u64 follows, flush_tid;
+ 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;
+ struct timespec mtime, atime, ctime;
+ u64 time_warp_seq;
+ int writing; /* a sync write is still in progress */
+ int dirty_pages; /* dirty pages awaiting writeback */
+ bool inline_data;
+};
+
+static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap)
+{
+ if (atomic_dec_and_test(&capsnap->nref)) {
+ if (capsnap->xattr_blob)
+ ceph_buffer_put(capsnap->xattr_blob);
+ kfree(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 ceph_mds_session *lease_session;
+ u32 lease_gen, lease_shared_gen;
+ u32 lease_seq;
+ unsigned long lease_renew_after, lease_renew_from;
+ struct list_head lru;
+ struct dentry *dentry;
+ u64 time;
+ u64 offset;
+};
+
+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 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 i_ceph_flags;
+ int i_ordered_count;
+ atomic_t i_release_count;
+ atomic_t i_complete_count;
+
+ struct ceph_dir_layout i_dir_layout;
+ struct ceph_file_layout i_layout;
+ char *i_symlink;
+
+ /* for dirs */
+ struct timespec i_rctime;
+ u64 i_rbytes, i_rfiles, i_rsubdirs;
+ u64 i_files, i_subdirs;
+
+ struct rb_root i_fragtree;
+ 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 */
+ struct list_head i_dirty_item, i_flushing_item;
+ u64 i_cap_flush_seq;
+ /* 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. */
+ u16 i_cap_flush_last_tid, i_cap_flush_tid[CEPH_CAP_BITS];
+ wait_queue_head_t i_cap_wq; /* threads waiting on a capability */
+ unsigned long i_hold_caps_min; /* jiffies */
+ 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 */
+
+ int i_nr_by_mode[CEPH_FILE_MODE_NUM]; /* 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;
+ int i_wrbuffer_ref, i_wrbuffer_ref_head;
+ u32 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_writes; /* uncommitted sync writes */
+ struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */
+ spinlock_t i_unsafe_lock;
+
+ struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */
+ int i_snap_realm_counter; /* snap realm (if caps) */
+ struct list_head i_snap_realm_item;
+ struct list_head i_snap_flush_item;
+
+ struct work_struct i_wb_work; /* writeback work */
+ struct work_struct i_pg_inv_work; /* page invalidation work */
+
+ struct work_struct i_vmtruncate_work;
+
+#ifdef CONFIG_CEPH_FSCACHE
+ struct fscache_cookie *fscache;
+ u32 i_fscache_gen; /* sequence, for delayed fscache validate */
+ struct work_struct i_revalidate_work;
+#endif
+ struct inode vfs_inode; /* at end */
+};
+
+static inline struct ceph_inode_info *ceph_inode(struct inode *inode)
+{
+ return container_of(inode, struct ceph_inode_info, vfs_inode);
+}
+
+static inline struct ceph_fs_client *ceph_inode_to_client(struct inode *inode)
+{
+ return (struct ceph_fs_client *)inode->i_sb->s_fs_info;
+}
+
+static inline struct ceph_fs_client *ceph_sb_to_client(struct super_block *sb)
+{
+ return (struct ceph_fs_client *)sb->s_fs_info;
+}
+
+static inline struct ceph_vino ceph_vino(struct inode *inode)
+{
+ return ceph_inode(inode)->i_vino;
+}
+
+/*
+ * ino_t is <64 bits on many architectures, blech.
+ *
+ * i_ino (kernel inode) st_ino (userspace)
+ * i386 32 32
+ * x86_64+ino32 64 32
+ * x86_64 64 64
+ */
+static inline u32 ceph_ino_to_ino32(__u64 vino)
+{
+ u32 ino = vino & 0xffffffff;
+ ino ^= vino >> 32;
+ if (!ino)
+ ino = 2;
+ return ino;
+}
+
+/*
+ * kernel i_ino value
+ */
+static inline ino_t ceph_vino_to_ino(struct ceph_vino vino)
+{
+#if BITS_PER_LONG == 32
+ return ceph_ino_to_ino32(vino.ino);
+#else
+ return (ino_t)vino.ino;
+#endif
+}
+
+/*
+ * user-visible ino (stat, filldir)
+ */
+#if BITS_PER_LONG == 32
+static inline ino_t ceph_translate_ino(struct super_block *sb, ino_t ino)
+{
+ return ino;
+}
+#else
+static inline ino_t ceph_translate_ino(struct super_block *sb, ino_t ino)
+{
+ if (ceph_test_mount_opt(ceph_sb_to_client(sb), INO32))
+ ino = ceph_ino_to_ino32(ino);
+ return ino;
+}
+#endif
+
+
+/* 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;
+}
+
+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;
+}
+
+static inline struct inode *ceph_find_inode(struct super_block *sb,
+ struct ceph_vino vino)
+{
+ ino_t t = ceph_vino_to_ino(vino);
+ return ilookup5(sb, t, ceph_ino_compare, &vino);
+}
+
+
+/*
+ * Ceph inode.
+ */
+#define CEPH_I_DIR_ORDERED 1 /* dentries in dir are ordered */
+#define CEPH_I_NODELAY 4 /* do not delay cap release */
+#define CEPH_I_FLUSH 8 /* do not delay flush of dirty metadata */
+#define CEPH_I_NOFLUSH 16 /* do not flush dirty caps */
+
+static inline void __ceph_dir_set_complete(struct ceph_inode_info *ci,
+ int release_count, int ordered_count)
+{
+ atomic_set(&ci->i_complete_count, release_count);
+ if (ci->i_ordered_count == ordered_count)
+ ci->i_ceph_flags |= CEPH_I_DIR_ORDERED;
+ else
+ ci->i_ceph_flags &= ~CEPH_I_DIR_ORDERED;
+}
+
+static inline void __ceph_dir_clear_complete(struct ceph_inode_info *ci)
+{
+ atomic_inc(&ci->i_release_count);
+}
+
+static inline bool __ceph_dir_is_complete(struct ceph_inode_info *ci)
+{
+ return atomic_read(&ci->i_complete_count) ==
+ atomic_read(&ci->i_release_count);
+}
+
+static inline bool __ceph_dir_is_complete_ordered(struct ceph_inode_info *ci)
+{
+ return __ceph_dir_is_complete(ci) &&
+ (ci->i_ceph_flags & CEPH_I_DIR_ORDERED);
+}
+
+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)
+{
+ struct ceph_inode_info *ci = ceph_inode(inode);
+ spin_lock(&ci->i_ceph_lock);
+ ci->i_ordered_count++;
+ ci->i_ceph_flags &= ~CEPH_I_DIR_ORDERED;
+ spin_unlock(&ci->i_ceph_lock);
+}
+
+static inline bool ceph_dir_is_complete_ordered(struct inode *inode)
+{
+ struct ceph_inode_info *ci = ceph_inode(inode);
+ bool ret;
+ spin_lock(&ci->i_ceph_lock);
+ ret = __ceph_dir_is_complete_ordered(ci);
+ spin_unlock(&ci->i_ceph_lock);
+ 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(struct dentry *dentry)
+{
+ return (struct ceph_dentry_info *)dentry->d_fsdata;
+}
+
+static inline loff_t ceph_make_fpos(unsigned frag, unsigned off)
+{
+ return ((loff_t)frag << 32) | (loff_t)off;
+}
+
+/*
+ * caps helpers
+ */
+static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci)
+{
+ return !RB_EMPTY_ROOT(&ci->i_caps);
+}
+
+extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented);
+extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t);
+extern int __ceph_caps_issued_other(struct ceph_inode_info *ci,
+ struct ceph_cap *cap);
+
+static inline int ceph_caps_issued(struct ceph_inode_info *ci)
+{
+ int issued;
+ spin_lock(&ci->i_ceph_lock);
+ issued = __ceph_caps_issued(ci, NULL);
+ spin_unlock(&ci->i_ceph_lock);
+ return issued;
+}
+
+static inline int ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask,
+ int touch)
+{
+ int r;
+ spin_lock(&ci->i_ceph_lock);
+ r = __ceph_caps_issued_mask(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 int __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask);
+
+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);
+
+extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci);
+
+/*
+ * wanted, by virtue of open file modes AND cap refs (buffered/cached data)
+ */
+static inline int __ceph_caps_wanted(struct ceph_inode_info *ci)
+{
+ int w = __ceph_caps_file_wanted(ci) | __ceph_caps_used(ci);
+ if (w & CEPH_CAP_FILE_BUFFER)
+ w |= CEPH_CAP_FILE_EXCL; /* we want EXCL if dirty data */
+ return w;
+}
+
+/* what the mds thinks we want */
+extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci);
+
+extern void ceph_caps_init(struct ceph_mds_client *mdsc);
+extern void ceph_caps_finalize(struct ceph_mds_client *mdsc);
+extern void ceph_adjust_min_caps(struct ceph_mds_client *mdsc, int delta);
+extern void ceph_reserve_caps(struct ceph_mds_client *mdsc,
+ struct ceph_cap_reservation *ctx, int need);
+extern int 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);
+
+
+
+/*
+ * 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_* */
+
+ /* readdir: position within the dir */
+ u32 frag;
+ struct ceph_mds_request *last_readdir;
+
+ /* readdir: position within a frag */
+ unsigned offset; /* offset of last chunk, adjusted for . and .. */
+ unsigned next_offset; /* offset of next chunk (last_name's + 1) */
+ char *last_name; /* last entry in previous chunk */
+ struct dentry *dentry; /* next dentry (for dcache readdir) */
+ int dir_release_count;
+ int dir_ordered_count;
+
+ /* used for -o dirstat read() on directory thing */
+ char *dir_info;
+ int dir_info_len;
+};
+
+
+
+/*
+ * A "snap realm" describes a subset of the file hierarchy sharing
+ * the same set of snapshots that apply to it. The realms themselves
+ * are organized into a hierarchy, such that children inherit (some of)
+ * the snapshots of their parents.
+ *
+ * All inodes within the realm that have capabilities are linked into a
+ * per-realm list.
+ */
+struct ceph_snap_realm {
+ u64 ino;
+ atomic_t nref;
+ struct rb_node node;
+
+ u64 created, seq;
+ u64 parent_ino;
+ u64 parent_since; /* snapid when our current parent became so */
+
+ u64 *prior_parent_snaps; /* snaps inherited from any parents we */
+ 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 */
+
+ /* 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;
+}
+
+
+
+/* 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);
+extern void ceph_handle_snap(struct ceph_mds_client *mdsc,
+ struct ceph_mds_session *session,
+ struct ceph_msg *msg);
+extern void ceph_queue_cap_snap(struct ceph_inode_info *ci);
+extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci,
+ struct ceph_cap_snap *capsnap);
+extern void ceph_cleanup_empty_realms(struct ceph_mds_client *mdsc);
+extern int ceph_snap_init(void);
+extern void ceph_snap_exit(void);
+
+/*
+ * a cap_snap is "pending" if it is still awaiting an in-progress
+ * sync write (that may/may not still update size, mtime, etc.).
+ */
+static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci)
+{
+ return !list_empty(&ci->i_cap_snaps) &&
+ list_entry(ci->i_cap_snaps.prev, struct ceph_cap_snap,
+ ci_item)->writing;
+}
+
+/* inode.c */
+extern const struct inode_operations ceph_file_iops;
+
+extern struct inode *ceph_alloc_inode(struct super_block *sb);
+extern void ceph_destroy_inode(struct inode *inode);
+extern int ceph_drop_inode(struct inode *inode);
+
+extern struct inode *ceph_get_inode(struct super_block *sb,
+ struct ceph_vino vino);
+extern struct inode *ceph_get_snapdir(struct inode *parent);
+extern int ceph_fill_file_size(struct inode *inode, int issued,
+ u32 truncate_seq, u64 truncate_size, u64 size);
+extern void ceph_fill_file_time(struct inode *inode, int issued,
+ u64 time_warp_seq, struct timespec *ctime,
+ struct timespec *mtime, struct timespec *atime);
+extern int ceph_fill_trace(struct super_block *sb,
+ struct ceph_mds_request *req,
+ struct ceph_mds_session *session);
+extern int ceph_readdir_prepopulate(struct ceph_mds_request *req,
+ struct ceph_mds_session *session);
+
+extern int ceph_inode_holds_cap(struct inode *inode, int mask);
+
+extern int ceph_inode_set_size(struct inode *inode, loff_t size);
+extern void __ceph_do_pending_vmtruncate(struct inode *inode);
+extern void ceph_queue_vmtruncate(struct inode *inode);
+
+extern void ceph_queue_invalidate(struct inode *inode);
+extern void ceph_queue_writeback(struct inode *inode);
+
+extern int __ceph_do_getattr(struct inode *inode, 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 inode *inode, int mask);
+extern int ceph_setattr(struct dentry *dentry, struct iattr *attr);
+extern int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry,
+ struct kstat *stat);
+
+/* xattr.c */
+extern int ceph_setxattr(struct dentry *, const char *, const void *,
+ size_t, int);
+int __ceph_setxattr(struct dentry *, const char *, const void *, size_t, int);
+ssize_t __ceph_getxattr(struct inode *, const char *, void *, size_t);
+int __ceph_removexattr(struct dentry *, const char *);
+extern ssize_t ceph_getxattr(struct dentry *, const char *, void *, size_t);
+extern ssize_t ceph_listxattr(struct dentry *, char *, size_t);
+extern int ceph_removexattr(struct dentry *, const char *);
+extern void __ceph_build_xattrs_blob(struct ceph_inode_info *ci);
+extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci);
+extern void __init ceph_xattr_init(void);
+extern void ceph_xattr_exit(void);
+extern const struct xattr_handler *ceph_xattr_handlers[];
+
+/* acl.c */
+struct ceph_acls_info {
+ void *default_acl;
+ void *acl;
+ struct ceph_pagelist *pagelist;
+};
+
+#ifdef CONFIG_CEPH_FS_POSIX_ACL
+
+struct posix_acl *ceph_get_acl(struct inode *, int);
+int ceph_set_acl(struct inode *inode, struct posix_acl *acl, int type);
+int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
+ struct ceph_acls_info *info);
+void ceph_init_inode_acls(struct inode *inode, struct ceph_acls_info *info);
+void ceph_release_acls_info(struct ceph_acls_info *info);
+
+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_acls_info *info)
+{
+ return 0;
+}
+static inline void ceph_init_inode_acls(struct inode *inode,
+ struct ceph_acls_info *info)
+{
+}
+static inline void ceph_release_acls_info(struct ceph_acls_info *info)
+{
+}
+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,
+ int fmode, 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_put_cap(struct ceph_mds_client *mdsc,
+ struct ceph_cap *cap);
+extern int ceph_is_any_caps(struct inode *inode);
+
+extern void __queue_cap_release(struct ceph_mds_session *session, u64 ino,
+ u64 cap_id, u32 migrate_seq, u32 issue_seq);
+extern void ceph_queue_caps_release(struct inode *inode);
+extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc);
+extern int ceph_fsync(struct file *file, loff_t start, loff_t end,
+ int datasync);
+extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc,
+ struct ceph_mds_session *session);
+extern struct ceph_cap *ceph_get_cap_for_mds(struct ceph_inode_info *ci,
+ int mds);
+extern int ceph_get_cap_mds(struct inode *inode);
+extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps);
+extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had);
+extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr,
+ struct ceph_snap_context *snapc);
+extern void __ceph_flush_snaps(struct ceph_inode_info *ci,
+ struct ceph_mds_session **psession,
+ int again);
+extern void ceph_check_caps(struct ceph_inode_info *ci, int flags,
+ struct ceph_mds_session *session);
+extern void ceph_check_delayed_caps(struct ceph_mds_client *mdsc);
+extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc);
+
+extern int ceph_encode_inode_release(void **p, struct inode *inode,
+ int mds, int drop, int unless, int force);
+extern int ceph_encode_dentry_release(void **p, struct dentry *dn,
+ int mds, int drop, int unless);
+
+extern int ceph_get_caps(struct ceph_inode_info *ci, int need, int want,
+ loff_t endoff, int *got, struct page **pinned_page);
+
+/* for counting open files by mode */
+static inline void __ceph_get_fmode(struct ceph_inode_info *ci, int mode)
+{
+ ci->i_nr_by_mode[mode]++;
+}
+extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode);
+
+/* addr.c */
+extern const struct address_space_operations ceph_aops;
+extern int ceph_mmap(struct file *file, struct vm_area_struct *vma);
+
+/* file.c */
+extern const struct file_operations ceph_file_fops;
+
+extern 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,
+ int *opened);
+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);
+int ceph_uninline_data(struct file *filp, struct page *locked_page);
+/* 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, ceph_snap_dentry_ops,
+ ceph_snapdir_dentry_ops;
+
+extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry);
+extern int ceph_handle_snapdir(struct ceph_mds_request *req,
+ struct dentry *dentry, int err);
+extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req,
+ struct dentry *dentry, int err);
+
+extern void ceph_dentry_lru_add(struct dentry *dn);
+extern void ceph_dentry_lru_touch(struct dentry *dn);
+extern void ceph_dentry_lru_del(struct dentry *dn);
+extern void ceph_invalidate_dentry_lease(struct dentry *dentry);
+extern unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn);
+extern struct inode *ceph_get_dentry_parent_inode(struct dentry *dentry);
+
+/*
+ * our d_ops vary depending on whether the inode is live,
+ * snapshotted (read-only), or a virtual ".snap" directory.
+ */
+int ceph_init_dentry(struct dentry *dentry);
+
+
+/* ioctl.c */
+extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
+
+/* export.c */
+extern const struct export_operations ceph_export_ops;
+
+/* 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);
+extern int lock_to_ceph_filelock(struct file_lock *fl, struct ceph_filelock *c);
+
+/* debugfs.c */
+extern int ceph_fs_debugfs_init(struct ceph_fs_client *client);
+extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client);
+
+#endif /* _FS_CEPH_SUPER_H */
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-18 15:06:47 +0000