diff options
Diffstat (limited to 'xlators/features/read-only/src/read-only-common.c')
| -rw-r--r-- | xlators/features/read-only/src/read-only-common.c | 406 |
1 files changed, 406 insertions, 0 deletions
diff --git a/xlators/features/read-only/src/read-only-common.c b/xlators/features/read-only/src/read-only-common.c new file mode 100644 index 00000000000..9640e7e3eee --- /dev/null +++ b/xlators/features/read-only/src/read-only-common.c @@ -0,0 +1,406 @@ +/* + 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. +*/ +#include "read-only.h" +#include "read-only-mem-types.h" +#include <glusterfs/defaults.h> + +gf_boolean_t +is_readonly_or_worm_enabled(call_frame_t *frame, xlator_t *this) +{ + read_only_priv_t *priv = NULL; + gf_boolean_t readonly_or_worm_enabled = _gf_false; + + priv = this->private; + GF_ASSERT(priv); + + readonly_or_worm_enabled = priv->readonly_or_worm_enabled; + + if (frame->root->pid < GF_CLIENT_PID_MAX) + readonly_or_worm_enabled = _gf_false; + + return readonly_or_worm_enabled; +} + +static int +_check_key_is_zero_filled(dict_t *d, char *k, data_t *v, void *tmp) +{ + if (mem_0filled((const char *)v->data, v->len)) { + /* -1 means, no more iterations, treat as 'break' */ + return -1; + } + return 0; +} + +int32_t +ro_xattrop(call_frame_t *frame, xlator_t *this, loc_t *loc, + gf_xattrop_flags_t flags, dict_t *dict, dict_t *xdata) +{ + gf_boolean_t allzero = _gf_false; + int ret = 0; + + ret = dict_foreach(dict, _check_key_is_zero_filled, NULL); + if (ret == 0) + allzero = _gf_true; + + if (is_readonly_or_worm_enabled(frame, this) && !allzero) + STACK_UNWIND_STRICT(xattrop, frame, -1, EROFS, NULL, xdata); + else + STACK_WIND_TAIL(frame, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->xattrop, loc, flags, dict, + xdata); + return 0; +} + +int32_t +ro_fxattrop(call_frame_t *frame, xlator_t *this, fd_t *fd, + gf_xattrop_flags_t flags, dict_t *dict, dict_t *xdata) +{ + gf_boolean_t allzero = _gf_false; + int ret = 0; + + ret = dict_foreach(dict, _check_key_is_zero_filled, NULL); + if (ret == 0) + allzero = _gf_true; + + if (is_readonly_or_worm_enabled(frame, this) && !allzero) + STACK_UNWIND_STRICT(fxattrop, frame, -1, EROFS, NULL, xdata); + else + STACK_WIND_TAIL(frame, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->fxattrop, fd, flags, dict, + xdata); + + 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, + dict_t *xdata) +{ + STACK_WIND_TAIL(frame, FIRST_CHILD(this), FIRST_CHILD(this)->fops->entrylk, + volume, loc, basename, cmd, type, xdata); + + 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, + dict_t *xdata) +{ + STACK_WIND_TAIL(frame, FIRST_CHILD(this), FIRST_CHILD(this)->fops->fentrylk, + volume, fd, basename, cmd, type, xdata); + + return 0; +} + +int32_t +ro_inodelk(call_frame_t *frame, xlator_t *this, const char *volume, loc_t *loc, + int32_t cmd, struct gf_flock *lock, dict_t *xdata) +{ + STACK_WIND_TAIL(frame, FIRST_CHILD(this), FIRST_CHILD(this)->fops->inodelk, + volume, loc, cmd, lock, xdata); + + return 0; +} + +int32_t +ro_finodelk(call_frame_t *frame, xlator_t *this, const char *volume, fd_t *fd, + int32_t cmd, struct gf_flock *lock, dict_t *xdata) +{ + STACK_WIND_TAIL(frame, FIRST_CHILD(this), FIRST_CHILD(this)->fops->finodelk, + volume, fd, cmd, lock, xdata); + + return 0; +} + +int32_t +ro_lk(call_frame_t *frame, xlator_t *this, fd_t *fd, int cmd, + struct gf_flock *flock, dict_t *xdata) +{ + STACK_WIND_TAIL(frame, FIRST_CHILD(this), FIRST_CHILD(this)->fops->lk, fd, + cmd, flock, xdata); + + return 0; +} + +int32_t +ro_setattr(call_frame_t *frame, xlator_t *this, loc_t *loc, struct iatt *stbuf, + int32_t valid, dict_t *xdata) +{ + if (is_readonly_or_worm_enabled(frame, this)) + STACK_UNWIND_STRICT(setattr, frame, -1, EROFS, NULL, NULL, xdata); + else + STACK_WIND_TAIL(frame, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->setattr, loc, stbuf, valid, + xdata); + + return 0; +} + +int32_t +ro_fsetattr(call_frame_t *frame, xlator_t *this, fd_t *fd, struct iatt *stbuf, + int32_t valid, dict_t *xdata) +{ + if (is_readonly_or_worm_enabled(frame, this)) + STACK_UNWIND_STRICT(fsetattr, frame, -1, EROFS, NULL, NULL, xdata); + else + STACK_WIND_TAIL(frame, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->fsetattr, fd, stbuf, valid, + xdata); + + return 0; +} + +int32_t +ro_truncate(call_frame_t *frame, xlator_t *this, loc_t *loc, off_t offset, + dict_t *xdata) +{ + if (is_readonly_or_worm_enabled(frame, this)) + STACK_UNWIND_STRICT(truncate, frame, -1, EROFS, NULL, NULL, xdata); + else + STACK_WIND_TAIL(frame, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->truncate, loc, offset, xdata); + + return 0; +} + +int32_t +ro_ftruncate(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset, + dict_t *xdata) +{ + if (is_readonly_or_worm_enabled(frame, this)) + STACK_UNWIND_STRICT(ftruncate, frame, -1, EROFS, NULL, NULL, xdata); + else + STACK_WIND_TAIL(frame, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->ftruncate, fd, offset, xdata); + + return 0; +} + +int32_t +ro_fallocate(call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t mode, + off_t offset, size_t len, dict_t *xdata) +{ + if (is_readonly_or_worm_enabled(frame, this)) + STACK_UNWIND_STRICT(fallocate, frame, -1, EROFS, NULL, NULL, xdata); + else + STACK_WIND_TAIL(frame, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->fallocate, fd, mode, offset, + len, xdata); + return 0; +} + +int +ro_mknod(call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode, + dev_t rdev, mode_t umask, dict_t *xdata) +{ + if (is_readonly_or_worm_enabled(frame, this)) + STACK_UNWIND_STRICT(mknod, frame, -1, EROFS, NULL, NULL, NULL, NULL, + xdata); + else + STACK_WIND_TAIL(frame, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->mknod, loc, mode, rdev, umask, + xdata); + + return 0; +} + +int +ro_mkdir(call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode, + mode_t umask, dict_t *xdata) +{ + if (is_readonly_or_worm_enabled(frame, this)) + STACK_UNWIND_STRICT(mkdir, frame, -1, EROFS, NULL, NULL, NULL, NULL, + xdata); + else + STACK_WIND_TAIL(frame, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->mkdir, loc, mode, umask, + xdata); + + return 0; +} + +int32_t +ro_unlink(call_frame_t *frame, xlator_t *this, loc_t *loc, int xflag, + dict_t *xdata) +{ + if (is_readonly_or_worm_enabled(frame, this)) + STACK_UNWIND_STRICT(unlink, frame, -1, EROFS, NULL, NULL, xdata); + else + STACK_WIND_TAIL(frame, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->unlink, loc, xflag, xdata); + + return 0; +} + +int +ro_rmdir(call_frame_t *frame, xlator_t *this, loc_t *loc, int flags, + dict_t *xdata) +{ + if (is_readonly_or_worm_enabled(frame, this)) + STACK_UNWIND_STRICT(rmdir, frame, -1, EROFS, NULL, NULL, xdata); + else + STACK_WIND_TAIL(frame, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->rmdir, loc, flags, xdata); + + return 0; +} + +int +ro_symlink(call_frame_t *frame, xlator_t *this, const char *linkpath, + loc_t *loc, mode_t umask, dict_t *xdata) +{ + if (is_readonly_or_worm_enabled(frame, this)) + STACK_UNWIND_STRICT(symlink, frame, -1, EROFS, NULL, NULL, NULL, NULL, + xdata); + else + STACK_WIND_TAIL(frame, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->symlink, linkpath, loc, umask, + xdata); + + return 0; +} + +int32_t +ro_rename(call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc, + dict_t *xdata) +{ + if (is_readonly_or_worm_enabled(frame, this)) + STACK_UNWIND_STRICT(rename, frame, -1, EROFS, NULL, NULL, NULL, NULL, + NULL, xdata); + else + STACK_WIND_TAIL(frame, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->rename, oldloc, newloc, xdata); + + return 0; +} + +int32_t +ro_link(call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc, + dict_t *xdata) +{ + if (is_readonly_or_worm_enabled(frame, this)) + STACK_UNWIND_STRICT(link, frame, -1, EROFS, NULL, NULL, NULL, NULL, + xdata); + else + STACK_WIND_TAIL(frame, FIRST_CHILD(this), FIRST_CHILD(this)->fops->link, + oldloc, newloc, xdata); + + return 0; +} + +int32_t +ro_create(call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags, + mode_t mode, mode_t umask, fd_t *fd, dict_t *xdata) +{ + if (is_readonly_or_worm_enabled(frame, this)) + STACK_UNWIND_STRICT(create, frame, -1, EROFS, NULL, NULL, NULL, NULL, + NULL, xdata); + else + STACK_WIND_TAIL(frame, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->create, loc, flags, mode, + umask, fd, xdata); + + 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, dict_t *xdata) +{ + STACK_UNWIND_STRICT(open, frame, op_ret, op_errno, fd, xdata); + return 0; +} + +int32_t +ro_open(call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags, + fd_t *fd, dict_t *xdata) +{ + if (is_readonly_or_worm_enabled(frame, this) && + (((flags & O_ACCMODE) == O_WRONLY) || + ((flags & O_ACCMODE) == O_RDWR))) { + STACK_UNWIND_STRICT(open, frame, -1, EROFS, NULL, xdata); + return 0; + } + + STACK_WIND(frame, ro_open_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->open, loc, flags, fd, xdata); + return 0; +} + +int32_t +ro_fsetxattr(call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *dict, + int32_t flags, dict_t *xdata) +{ + if (is_readonly_or_worm_enabled(frame, this)) + STACK_UNWIND_STRICT(fsetxattr, frame, -1, EROFS, xdata); + else + STACK_WIND_TAIL(frame, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->fsetxattr, fd, dict, flags, + xdata); + + return 0; +} + +int32_t +ro_fsyncdir(call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t flags, + dict_t *xdata) +{ + if (is_readonly_or_worm_enabled(frame, this)) + STACK_UNWIND_STRICT(fsyncdir, frame, -1, EROFS, xdata); + else + STACK_WIND_TAIL(frame, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->fsyncdir, fd, flags, xdata); + + 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, uint32_t flags, struct iobref *iobref, + dict_t *xdata) +{ + if (is_readonly_or_worm_enabled(frame, this)) + STACK_UNWIND_STRICT(writev, frame, -1, EROFS, NULL, NULL, xdata); + else + STACK_WIND_TAIL(frame, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->writev, fd, vector, count, off, + flags, iobref, xdata); + + return 0; +} + +int32_t +ro_setxattr(call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *dict, + int32_t flags, dict_t *xdata) +{ + if (is_readonly_or_worm_enabled(frame, this)) + STACK_UNWIND_STRICT(setxattr, frame, -1, EROFS, xdata); + else + STACK_WIND_TAIL(frame, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->setxattr, loc, dict, flags, + xdata); + + return 0; +} + +int32_t +ro_removexattr(call_frame_t *frame, xlator_t *this, loc_t *loc, + const char *name, dict_t *xdata) +{ + if (is_readonly_or_worm_enabled(frame, this)) + STACK_UNWIND_STRICT(removexattr, frame, -1, EROFS, xdata); + else + STACK_WIND_TAIL(frame, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->removexattr, loc, name, xdata); + + return 0; +} |