diff options
Diffstat (limited to 'xlators/features/read-only/src/read-only.c')
| -rw-r--r-- | xlators/features/read-only/src/read-only.c | 373 |
1 files changed, 106 insertions, 267 deletions
diff --git a/xlators/features/read-only/src/read-only.c b/xlators/features/read-only/src/read-only.c index 49c2ce58dd1..48654998e63 100644 --- a/xlators/features/read-only/src/read-only.c +++ b/xlators/features/read-only/src/read-only.c @@ -1,305 +1,144 @@ /* - Copyright (c) 2008-2009 Gluster, Inc. <http://www.gluster.com> - This file is part of GlusterFS. + Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com> + This file is part of GlusterFS. - GlusterFS is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published - by the Free Software Foundation; either version 3 of the License, - or (at your option) any later version. - - GlusterFS is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program. If not, see - <http://www.gnu.org/licenses/>. + 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 _CONFIG_H -#define _CONFIG_H -#include "config.h" -#endif - -#include "xlator.h" -#include "defaults.h" - -int32_t -ro_xattrop (call_frame_t *frame, xlator_t *this, loc_t *loc, - gf_xattrop_flags_t flags, dict_t *dict) -{ - STACK_UNWIND_STRICT (xattrop, frame, -1, EROFS, NULL); - return 0; -} - -int32_t -ro_fxattrop (call_frame_t *frame, xlator_t *this, - fd_t *fd, gf_xattrop_flags_t flags, dict_t *dict) -{ - STACK_UNWIND_STRICT (fxattrop, frame, -1, EROFS, NULL); - return 0; -} - -int32_t -ro_entrylk (call_frame_t *frame, xlator_t *this, const char *volume, - loc_t *loc, const char *basename, entrylk_cmd cmd, - entrylk_type type) -{ - STACK_UNWIND_STRICT (entrylk, frame, -1, EROFS); - return 0; -} - -int32_t -ro_fentrylk (call_frame_t *frame, xlator_t *this, const char *volume, - fd_t *fd, const char *basename, entrylk_cmd cmd, entrylk_type type) -{ - STACK_UNWIND_STRICT (fentrylk, frame, -1, EROFS); - return 0; -} - -int32_t -ro_inodelk (call_frame_t *frame, xlator_t *this, const char *volume, - loc_t *loc, int32_t cmd, struct flock *lock) -{ - STACK_UNWIND_STRICT (inodelk, frame, -1, EROFS); - return 0; -} - -int32_t -ro_finodelk (call_frame_t *frame, xlator_t *this, const char *volume, - fd_t *fd, int32_t cmd, struct flock *lock) -{ - STACK_UNWIND_STRICT (finodelk, frame, -1, EROFS); - return 0; -} +#include "read-only-common.h" +#include "read-only-mem-types.h" +#include "read-only.h" int32_t -ro_lk (call_frame_t *frame, xlator_t *this, fd_t *fd, int cmd, - struct flock *flock) +mem_acct_init(xlator_t *this) { - STACK_UNWIND_STRICT (lk, frame, -1, EROFS, NULL); - return 0; -} + int ret = -1; -int32_t -ro_setattr (call_frame_t *frame, xlator_t *this, loc_t *loc, - struct iatt *stbuf, int32_t valid) -{ - STACK_UNWIND_STRICT (setattr, frame, -1, EROFS, NULL, NULL); - return 0; -} + ret = xlator_mem_acct_init(this, gf_read_only_mt_end + 1); + if (ret) + gf_log(this->name, GF_LOG_ERROR, + "Memory accounting " + "initialization failed."); -int32_t -ro_fsetattr (call_frame_t *frame, xlator_t *this, fd_t *fd, - struct iatt *stbuf, int32_t valid) -{ - STACK_UNWIND_STRICT (fsetattr, frame, -1, EROFS, NULL, NULL); - return 0; + return ret; } - int32_t -ro_truncate (call_frame_t *frame, xlator_t *this, loc_t *loc, off_t offset) +init(xlator_t *this) { - STACK_UNWIND_STRICT (truncate, frame, -1, EROFS, NULL, NULL); - return 0; -} + int ret = -1; + read_only_priv_t *priv = NULL; -int32_t -ro_ftruncate (call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset) -{ - STACK_UNWIND_STRICT (ftruncate, frame, -1, EROFS, NULL, NULL); - return 0; -} + if (!this->children || this->children->next) { + gf_log(this->name, GF_LOG_ERROR, + "translator not configured with exactly one child"); + return -1; + } -int -ro_mknod (call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode, - dev_t rdev, dict_t *params) -{ - STACK_UNWIND_STRICT (mknod, frame, -1, EROFS, NULL, NULL, NULL, NULL); - return 0; -} + if (!this->parents) { + gf_log(this->name, GF_LOG_WARNING, "dangling volume. check volfile "); + } + priv = GF_CALLOC(1, sizeof(*priv), gf_read_only_mt_priv_t); + if (!priv) + goto out; -int -ro_mkdir (call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode, - dict_t *params) -{ - STACK_UNWIND_STRICT (mkdir, frame, -1, EROFS, NULL, NULL, NULL, NULL); - return 0; -} + this->private = priv; -int32_t -ro_unlink (call_frame_t *frame, xlator_t *this, loc_t *loc) -{ - STACK_UNWIND_STRICT (unlink, frame, -1, EROFS, NULL, NULL); - return 0; -} + GF_OPTION_INIT("read-only", priv->readonly_or_worm_enabled, bool, out); -int32_t -ro_rmdir (call_frame_t *frame, xlator_t *this, loc_t *loc) -{ - STACK_UNWIND_STRICT (rmdir, frame, -1, EROFS, NULL, NULL); - return 0; + ret = 0; +out: + return ret; } - int -ro_symlink (call_frame_t *frame, xlator_t *this, const char *linkpath, - loc_t *loc, dict_t *params) -{ - STACK_UNWIND_STRICT (symlink, frame, -1, EROFS, NULL, NULL, NULL, NULL); - return 0; -} - - - -int32_t -ro_rename (call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc) -{ - STACK_UNWIND_STRICT (rename, frame, -1, EROFS, NULL, NULL, NULL, NULL, - NULL); - return 0; -} - - -int32_t -ro_link (call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc) -{ - STACK_UNWIND_STRICT (link, frame, -1, EROFS, NULL, NULL, NULL, NULL); - return 0; -} - -int32_t -ro_create (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags, - mode_t mode, fd_t *fd, dict_t *params) -{ - STACK_UNWIND_STRICT (create, frame, -1, EROFS, NULL, NULL, NULL, - NULL, NULL); - return 0; -} - - -static int32_t -ro_open_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, - int32_t op_errno, fd_t *fd) -{ - STACK_UNWIND_STRICT (open, frame, op_ret, op_errno, fd); - return 0; -} - -int32_t -ro_open (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags, - fd_t *fd, int32_t wbflags) -{ - if (((flags & O_ACCMODE) == O_WRONLY) || - ((flags & O_ACCMODE) == O_RDWR)) { - STACK_UNWIND_STRICT (open, frame, -1, EROFS, NULL); - return 0; - } - - STACK_WIND (frame, ro_open_cbk, FIRST_CHILD(this), - FIRST_CHILD(this)->fops->open, loc, flags, fd, wbflags); - return 0; -} - -int32_t -ro_fsetxattr (call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *dict, - int32_t flags) +reconfigure(xlator_t *this, dict_t *options) { - STACK_UNWIND_STRICT (fsetxattr, frame, -1, EROFS); - return 0; -} + read_only_priv_t *priv = NULL; + int ret = -1; + gf_boolean_t readonly_or_worm_enabled = _gf_false; -int32_t -ro_fsyncdir (call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t flags) -{ - STACK_UNWIND_STRICT (fsyncdir, frame, -1, EROFS); - return 0; -} - -int32_t -ro_writev (call_frame_t *frame, xlator_t *this, fd_t *fd, struct iovec *vector, - int32_t count, off_t off, struct iobref *iobref) -{ - STACK_UNWIND_STRICT (writev, frame, -1, EROFS, NULL, NULL); - return 0; -} - - -int32_t -ro_setxattr (call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *dict, - int32_t flags) -{ - STACK_UNWIND_STRICT (setxattr, frame, -1, EROFS); - return 0; -} + priv = this->private; + GF_ASSERT(priv); -int32_t -ro_removexattr (call_frame_t *frame, xlator_t *this, loc_t *loc, - const char *name) -{ - STACK_UNWIND_STRICT (removexattr, frame, -1, EROFS); - return 0; + GF_OPTION_RECONF("read-only", readonly_or_worm_enabled, options, bool, out); + priv->readonly_or_worm_enabled = readonly_or_worm_enabled; + ret = 0; +out: + gf_log(this->name, GF_LOG_DEBUG, "returning %d", ret); + return ret; } -int32_t -init (xlator_t *this) +void +fini(xlator_t *this) { - if (!this->children || this->children->next) { - gf_log (this->name, GF_LOG_ERROR, - "translator not configured with exactly one child"); - return -1; - } - - if (!this->parents) { - gf_log (this->name, GF_LOG_WARNING, - "dangling volume. check volfile "); - } + read_only_priv_t *priv = NULL; - return 0; -} + priv = this->private; + if (!priv) + return; + this->private = NULL; + GF_FREE(priv); -void -fini (xlator_t *this) -{ - return; + return; } - struct xlator_fops fops = { - .mknod = ro_mknod, - .mkdir = ro_mkdir, - .unlink = ro_unlink, - .rmdir = ro_rmdir, - .symlink = ro_symlink, - .rename = ro_rename, - .link = ro_link, - .truncate = ro_truncate, - .open = ro_open, - .writev = ro_writev, - .setxattr = ro_setxattr, - .fsetxattr = ro_fsetxattr, - .removexattr = ro_removexattr, - .fsyncdir = ro_fsyncdir, - .ftruncate = ro_ftruncate, - .create = ro_create, - .setattr = ro_setattr, - .fsetattr = ro_fsetattr, - .xattrop = ro_xattrop, - .fxattrop = ro_fxattrop, - .inodelk = ro_inodelk, - .finodelk = ro_finodelk, - .entrylk = ro_entrylk, - .fentrylk = ro_fentrylk, - .lk = ro_lk, + .mknod = ro_mknod, + .mkdir = ro_mkdir, + .unlink = ro_unlink, + .rmdir = ro_rmdir, + .symlink = ro_symlink, + .rename = ro_rename, + .link = ro_link, + .truncate = ro_truncate, + .open = ro_open, + .writev = ro_writev, + .setxattr = ro_setxattr, + .fsetxattr = ro_fsetxattr, + .removexattr = ro_removexattr, + .fsyncdir = ro_fsyncdir, + .ftruncate = ro_ftruncate, + .create = ro_create, + .setattr = ro_setattr, + .fsetattr = ro_fsetattr, + .xattrop = ro_xattrop, + .fxattrop = ro_fxattrop, + .inodelk = ro_inodelk, + .finodelk = ro_finodelk, + .entrylk = ro_entrylk, + .fentrylk = ro_fentrylk, + .lk = ro_lk, + .fallocate = ro_fallocate, }; -struct xlator_cbks cbks = { -}; +struct xlator_cbks cbks = {}; struct volume_options options[] = { - { .key = {NULL} }, + {.key = {"read-only"}, + .type = GF_OPTION_TYPE_BOOL, + .default_value = "off", + /*.validate_fn = validate_boolean,*/ + .op_version = {1}, + .flags = OPT_FLAG_SETTABLE, + .description = "When \"on\", makes a volume read-only. It is turned " + "\"off\" by default."}, + {.key = {NULL}}, +}; + +xlator_api_t xlator_api = { + .init = init, + .fini = fini, + .reconfigure = reconfigure, + .mem_acct_init = mem_acct_init, + .op_version = {1}, /* Present from the initial version */ + .fops = &fops, + .cbks = &cbks, + .options = options, + .identifier = "read-only", + .category = GF_TECH_PREVIEW, }; |