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/*
Copyright (c) 2008-2013 Red Hat, Inc. <http://www.redhat.com>
This file is part of GlusterFS.
This file is licensed to you under your choice of the GNU Lesser
General Public License, version 3 or any later version (LGPLv3 or
later), or the GNU General Public License, version 2 (GPLv2), in all
cases as published by the Free Software Foundation.
*/
#ifndef __READDIR_AHEAD_H
#define __READDIR_AHEAD_H
/* state flags */
#define RDA_FD_NEW (1 << 0)
#define RDA_FD_RUNNING (1 << 1)
#define RDA_FD_EOD (1 << 2)
#define RDA_FD_ERROR (1 << 3)
#define RDA_FD_BYPASS (1 << 4)
#define RDA_FD_PLUGGED (1 << 5)
#define RDA_COMMON_MODIFICATION_FOP(name, frame, this, __inode, __xdata, \
args...) \
do { \
struct rda_local *__local = NULL; \
rda_inode_ctx_t *ctx_p = NULL; \
\
__local = mem_get0(this->local_pool); \
__local->inode = inode_ref(__inode); \
LOCK(&__inode->lock); \
{ \
ctx_p = __rda_inode_ctx_get(__inode, this); \
} \
UNLOCK(&__inode->lock); \
__local->generation = GF_ATOMIC_GET(ctx_p->generation); \
\
frame->local = __local; \
if (__xdata) \
__local->xattrs = dict_ref(__xdata); \
\
STACK_WIND(frame, rda_##name##_cbk, FIRST_CHILD(this), \
FIRST_CHILD(this)->fops->name, args, __xdata); \
} while (0)
#define RDA_STACK_UNWIND(fop, frame, params...) \
do { \
struct rda_local *__local = NULL; \
if (frame) { \
__local = frame->local; \
frame->local = NULL; \
} \
STACK_UNWIND_STRICT(fop, frame, params); \
if (__local) { \
rda_local_wipe(__local); \
mem_put(__local); \
} \
} while (0)
struct rda_fd_ctx {
off_t cur_offset; /* current head of the ctx */
size_t cur_size; /* current size of the preload */
off_t next_offset; /* tail of the ctx */
uint32_t state;
gf_lock_t lock;
gf_dirent_t entries;
call_frame_t *fill_frame;
call_stub_t *stub;
int op_errno;
dict_t *xattrs; /* md-cache keys to be sent in readdirp() */
dict_t *writes_during_prefetch;
gf_atomic_t prefetching;
};
struct rda_local {
struct rda_fd_ctx *ctx;
fd_t *fd;
dict_t *xattrs; /* md-cache keys to be sent in readdirp() */
inode_t *inode;
off_t offset;
uint64_t generation;
int32_t skip_dir;
};
struct rda_priv {
uint64_t rda_req_size;
uint64_t rda_low_wmark;
uint64_t rda_high_wmark;
uint64_t rda_cache_limit;
gf_atomic_t rda_cache_size;
gf_boolean_t parallel_readdir;
};
typedef struct rda_inode_ctx {
struct iatt statbuf;
gf_atomic_t generation;
} rda_inode_ctx_t;
#endif /* __READDIR_AHEAD_H */
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