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Diffstat (limited to 'libglusterfs/src/glusterfs/fd.h')
-rw-r--r-- | libglusterfs/src/glusterfs/fd.h | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/libglusterfs/src/glusterfs/fd.h b/libglusterfs/src/glusterfs/fd.h new file mode 100644 index 00000000000..cdbe2894bc3 --- /dev/null +++ b/libglusterfs/src/glusterfs/fd.h @@ -0,0 +1,167 @@ +/* + Copyright (c) 2008-2012 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 _FD_H +#define _FD_H + +#include "glusterfs/list.h" +#include <sys/types.h> +#include <unistd.h> +#include "glusterfs/glusterfs.h" +#include "glusterfs/locking.h" +#include "glusterfs/fd-lk.h" +#include "glusterfs/common-utils.h" + +#define GF_ANON_FD_NO -2 +#define GF_ANON_FD_FLAGS (O_RDWR | O_LARGEFILE) + +struct _inode; +struct _dict; +struct fd_lk_ctx; + +struct _fd_ctx { + union { + uint64_t key; + void *xl_key; + }; + union { + uint64_t value1; + void *ptr1; + }; +}; + +struct _fd { + uint64_t pid; + int32_t flags; + gf_atomic_t refcount; + struct list_head inode_list; + struct _inode *inode; + gf_lock_t lock; /* used ONLY for manipulating + 'struct _fd_ctx' array (_ctx).*/ + struct _fd_ctx *_ctx; + int xl_count; /* Number of xl referred in this fd */ + struct fd_lk_ctx *lk_ctx; + gf_boolean_t anonymous; /* fd which does not have counterpart open + fd on backend (server for client, posix + for server). */ +}; +typedef struct _fd fd_t; + +struct fd_table_entry { + fd_t *fd; + int next_free; +}; +typedef struct fd_table_entry fdentry_t; + +struct _fdtable { + int refcount; + uint32_t max_fds; + pthread_rwlock_t lock; + fdentry_t *fdentries; + int first_free; +}; +typedef struct _fdtable fdtable_t; + +/* Signifies no more entries in the fd table. */ +#define GF_FDTABLE_END -1 + +/* This is used to invalidated + * the next_free value in an fdentry that has been allocated + */ +#define GF_FDENTRY_ALLOCATED -2 + +#include "glusterfs/logging.h" +#include "glusterfs/xlator.h" + +void +gf_fd_put(fdtable_t *fdtable, int32_t fd); + +fd_t * +gf_fd_fdptr_get(fdtable_t *fdtable, int64_t fd); + +fdtable_t * +gf_fd_fdtable_alloc(void); + +int +gf_fd_unused_get(fdtable_t *fdtable, fd_t *fdptr); + +fdentry_t * +gf_fd_fdtable_get_all_fds(fdtable_t *fdtable, uint32_t *count); + +void +gf_fd_fdtable_destroy(fdtable_t *fdtable); + +fd_t * +__fd_ref(fd_t *fd); + +fd_t * +fd_ref(fd_t *fd); + +void +fd_unref(fd_t *fd); + +fd_t * +fd_create(struct _inode *inode, pid_t pid); + +fd_t * +fd_create_uint64(struct _inode *inode, uint64_t pid); + +fd_t * +fd_lookup(struct _inode *inode, pid_t pid); + +fd_t * +fd_lookup_uint64(struct _inode *inode, uint64_t pid); + +fd_t * +fd_lookup_anonymous(inode_t *inode, int32_t flags); + +fd_t * +fd_anonymous(inode_t *inode); + +fd_t * +fd_anonymous_with_flags(inode_t *inode, int32_t flags); + +gf_boolean_t +fd_is_anonymous(fd_t *fd); + +uint8_t +fd_list_empty(struct _inode *inode); + +fd_t * +fd_bind(fd_t *fd); + +int +fd_ctx_set(fd_t *fd, xlator_t *xlator, uint64_t value); + +int +fd_ctx_get(fd_t *fd, xlator_t *xlator, uint64_t *value); + +int +fd_ctx_del(fd_t *fd, xlator_t *xlator, uint64_t *value); + +int +__fd_ctx_del(fd_t *fd, xlator_t *xlator, uint64_t *value); + +int +__fd_ctx_set(fd_t *fd, xlator_t *xlator, uint64_t value); + +int +__fd_ctx_get(fd_t *fd, xlator_t *xlator, uint64_t *value); + +void +fd_ctx_dump(fd_t *fd, char *prefix); + +fdentry_t * +gf_fd_fdtable_copy_all_fds(fdtable_t *fdtable, uint32_t *count); + +void +gf_fdptr_put(fdtable_t *fdtable, fd_t *fd); + +#endif /* _FD_H */ |