storage/posix: move the helper functions to separate file

helper functions were more than 800 lines

Signed-off-by: Amar Tumballi <amar@gluster.com>
Signed-off-by: Anand Avati <avati@gluster.com>

BUG: 3158 (Keep code more readable and clean)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=3158

1 files changed, 887 insertions, 0 deletions

diff --git a/xlators/storage/posix/src/posix-helpers.c b/xlators/storage/posix/src/posix-helpers.c
new file mode 100644
index 000000000..7b130d4b9
--- /dev/null
+++ b/xlators/storage/posix/src/posix-helpers.c
@@ -0,0 +1,887 @@
+/*
+  Copyright (c) 2006-2011 Gluster, Inc. <http://www.gluster.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 Affero 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
+  Affero General Public License for more details.
+
+  You should have received a copy of the GNU Affero General Public License
+  along with this program.  If not, see
+  <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#define __XOPEN_SOURCE 500
+
+#include <stdint.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <errno.h>
+#include <libgen.h>
+#include <pthread.h>
+#include <ftw.h>
+#include <sys/stat.h>
+
+#ifndef GF_BSD_HOST_OS
+#include <alloca.h>
+#endif /* GF_BSD_HOST_OS */
+
+#include "glusterfs.h"
+#include "md5.h"
+#include "checksum.h"
+#include "dict.h"
+#include "logging.h"
+#include "posix.h"
+#include "xlator.h"
+#include "defaults.h"
+#include "common-utils.h"
+#include "compat-errno.h"
+#include "compat.h"
+#include "byte-order.h"
+#include "syscall.h"
+#include "statedump.h"
+#include "locking.h"
+#include "timer.h"
+#include "glusterfs3-xdr.h"
+#include "hashfn.h"
+
+
+typedef struct {
+        xlator_t    *this;
+        const char  *real_path;
+        dict_t      *xattr;
+        struct iatt *stbuf;
+        loc_t       *loc;
+} posix_xattr_filler_t;
+
+
+static void
+_posix_xattr_get_set (dict_t *xattr_req,
+                      char *key,
+                      data_t *data,
+                      void *xattrargs)
+{
+        posix_xattr_filler_t *filler = xattrargs;
+        char     *value      = NULL;
+        ssize_t   xattr_size = -1;
+        int       ret      = -1;
+        char     *databuf  = NULL;
+        int       _fd      = -1;
+        loc_t    *loc      = NULL;
+        ssize_t  req_size  = 0;
+
+
+        if (!strcmp (key, "gfid-req"))
+                return;
+        /* should size be put into the data_t ? */
+        if (!strcmp (key, GF_CONTENT_KEY)
+            && IA_ISREG (filler->stbuf->ia_type)) {
+
+                /* file content request */
+                req_size = data_to_uint64 (data);
+                if (req_size >= filler->stbuf->ia_size) {
+                        _fd = open (filler->real_path, O_RDONLY);
+                        if (_fd == -1) {
+                                gf_log (filler->this->name, GF_LOG_ERROR,
+                                        "Opening file %s failed: %s",
+                                        filler->real_path, strerror (errno));
+                                goto err;
+                        }
+
+                        databuf = GF_CALLOC (1, filler->stbuf->ia_size,
+                                             gf_posix_mt_char);
+                        if (!databuf) {
+                                goto err;
+                        }
+
+                        ret = read (_fd, databuf, filler->stbuf->ia_size);
+                        if (ret == -1) {
+                                gf_log (filler->this->name, GF_LOG_ERROR,
+                                        "Read on file %s failed: %s",
+                                        filler->real_path, strerror (errno));
+                                goto err;
+                        }
+
+                        ret = close (_fd);
+                        _fd = -1;
+                        if (ret == -1) {
+                                gf_log (filler->this->name, GF_LOG_ERROR,
+                                        "Close on file %s failed: %s",
+                                        filler->real_path, strerror (errno));
+                                goto err;
+                        }
+
+                        ret = dict_set_bin (filler->xattr, key,
+                                            databuf, filler->stbuf->ia_size);
+                        if (ret < 0) {
+                                gf_log (filler->this->name, GF_LOG_ERROR,
+                                        "failed to set dict value. key: %s, path: %s",
+                                        key, filler->real_path);
+                                goto err;
+                        }
+
+                        /* To avoid double free in cleanup below */
+                        databuf = NULL;
+                err:
+                        if (_fd != -1)
+                                close (_fd);
+                        if (databuf)
+                                GF_FREE (databuf);
+                }
+        } else if (!strcmp (key, GLUSTERFS_OPEN_FD_COUNT)) {
+                loc = filler->loc;
+                if (!list_empty (&loc->inode->fd_list)) {
+                        ret = dict_set_uint32 (filler->xattr, key, 1);
+                        if (ret < 0)
+                                gf_log (filler->this->name, GF_LOG_WARNING,
+                                        "Failed to set dictionary value for %s",
+                                        key);
+                } else {
+                        ret = dict_set_uint32 (filler->xattr, key, 0);
+                        if (ret < 0)
+                                gf_log (filler->this->name, GF_LOG_WARNING,
+                                        "Failed to set dictionary value for %s",
+                                        key);
+                }
+        } else {
+                xattr_size = sys_lgetxattr (filler->real_path, key, NULL, 0);
+
+                if (xattr_size > 0) {
+                        value = GF_CALLOC (1, xattr_size + 1,
+                                           gf_posix_mt_char);
+                        if (!value)
+                                return;
+
+                        sys_lgetxattr (filler->real_path, key, value,
+                                       xattr_size);
+
+                        value[xattr_size] = '\0';
+                        ret = dict_set_bin (filler->xattr, key,
+                                            value, xattr_size);
+                        if (ret < 0)
+                                gf_log (filler->this->name, GF_LOG_DEBUG,
+                                        "dict set failed. path: %s, key: %s",
+                                        filler->real_path, key);
+                }
+        }
+}
+
+
+int
+posix_fill_gfid_path (xlator_t *this, const char *path, struct iatt *iatt)
+{
+        int ret = 0;
+
+        if (!iatt)
+                return 0;
+
+        ret = sys_lgetxattr (path, GFID_XATTR_KEY, iatt->ia_gfid, 16);
+        /* Return value of getxattr */
+        if (ret == 16)
+                ret = 0;
+
+        return ret;
+}
+
+
+int
+posix_fill_gfid_fd (xlator_t *this, int fd, struct iatt *iatt)
+{
+        int ret = 0;
+
+        if (!iatt)
+                return 0;
+
+        ret = sys_fgetxattr (fd, GFID_XATTR_KEY, iatt->ia_gfid, 16);
+        /* Return value of getxattr */
+        if (ret == 16)
+                ret = 0;
+
+        return ret;
+}
+
+void
+posix_fill_ino_from_gfid (xlator_t *this, struct iatt *buf)
+{
+        uint64_t temp_ino = 0;
+        int j = 0;
+        int i = 0;
+
+        /* consider least significant 8 bytes of value out of gfid */
+        for (i = 15; i > (15 - 8); i--) {
+                temp_ino += buf->ia_gfid[i] << j;
+                j += 8;
+        }
+
+        buf->ia_ino = temp_ino;
+}
+
+int
+posix_lstat_with_gfid (xlator_t *this, const char *path, struct iatt *stbuf_p)
+{
+        struct posix_private  *priv    = NULL;
+        int                    ret     = 0;
+        struct stat            lstatbuf = {0, };
+        struct iatt            stbuf = {0, };
+
+        priv = this->private;
+
+        ret = lstat (path, &lstatbuf);
+        if (ret == -1)
+                goto out;
+
+        iatt_from_stat (&stbuf, &lstatbuf);
+
+        ret = posix_fill_gfid_path (this, path, &stbuf);
+        if (ret)
+                gf_log_callingfn (this->name, GF_LOG_DEBUG, "failed to get gfid");
+
+        posix_fill_ino_from_gfid (this, &stbuf);
+
+        if (stbuf_p)
+                *stbuf_p = stbuf;
+out:
+        return ret;
+}
+
+
+int
+posix_fstat_with_gfid (xlator_t *this, int fd, struct iatt *stbuf_p)
+{
+        struct posix_private  *priv    = NULL;
+        int                    ret     = 0;
+        struct stat            fstatbuf = {0, };
+        struct iatt            stbuf = {0, };
+
+        priv = this->private;
+
+        ret = fstat (fd, &fstatbuf);
+        if (ret == -1)
+                goto out;
+
+        iatt_from_stat (&stbuf, &fstatbuf);
+
+        ret = posix_fill_gfid_fd (this, fd, &stbuf);
+        if (ret)
+                gf_log_callingfn (this->name, GF_LOG_DEBUG, "failed to get gfid");
+
+        posix_fill_ino_from_gfid (this, &stbuf);
+
+        if (stbuf_p)
+                *stbuf_p = stbuf;
+
+out:
+        return ret;
+}
+
+
+dict_t *
+posix_lookup_xattr_fill (xlator_t *this, const char *real_path, loc_t *loc,
+                         dict_t *xattr_req, struct iatt *buf)
+{
+        dict_t     *xattr             = NULL;
+        posix_xattr_filler_t filler   = {0, };
+
+        xattr = get_new_dict();
+        if (!xattr) {
+                goto out;
+        }
+
+        filler.this      = this;
+        filler.real_path = real_path;
+        filler.xattr     = xattr;
+        filler.stbuf     = buf;
+        filler.loc       = loc;
+
+        dict_foreach (xattr_req, _posix_xattr_get_set, &filler);
+out:
+        return xattr;
+}
+
+
+/*
+ * If the parent directory of {real_path} has the setgid bit set,
+ * then set {gid} to the gid of the parent. Otherwise,
+ * leave {gid} unchanged.
+ */
+
+int
+setgid_override (xlator_t *this, char *real_path, gid_t *gid)
+{
+        char *                 tmp_path     = NULL;
+        char *                 parent_path  = NULL;
+        struct iatt            parent_stbuf;
+
+        int op_ret = 0;
+
+        tmp_path = gf_strdup (real_path);
+        if (!tmp_path) {
+                op_ret = -ENOMEM;
+                goto out;
+        }
+
+        parent_path = dirname (tmp_path);
+
+        op_ret = posix_lstat_with_gfid (this, parent_path, &parent_stbuf);
+        if (op_ret == -1) {
+                op_ret = -errno;
+                gf_log_callingfn (this->name, GF_LOG_ERROR,
+                                  "lstat on parent directory (%s) failed: %s",
+                                  parent_path, strerror (errno));
+                goto out;
+        }
+
+        if (parent_stbuf.ia_prot.sgid) {
+                /*
+                 * Entries created inside a setgid directory
+                 * should inherit the gid from the parent
+                 */
+
+                *gid = parent_stbuf.ia_gid;
+        }
+out:
+
+        if (tmp_path)
+                GF_FREE (tmp_path);
+
+        return op_ret;
+}
+
+
+int
+posix_gfid_set (xlator_t *this, const char *path, dict_t *xattr_req)
+{
+        void        *uuid_req = NULL;
+        uuid_t       uuid_curr;
+        int          ret = 0;
+        struct stat  stat = {0, };
+
+        if (!xattr_req)
+                goto out;
+
+        if (sys_lstat (path, &stat) != 0)
+                goto out;
+
+        ret = sys_lgetxattr (path, GFID_XATTR_KEY, uuid_curr, 16);
+        if (ret == 16) {
+                ret = 0;
+                goto out;
+        }
+
+        ret = dict_get_ptr (xattr_req, "gfid-req", &uuid_req);
+        if (ret) {
+                gf_log_callingfn (this->name, GF_LOG_DEBUG,
+                                  "failed to get the gfid from dict");
+                goto out;
+        }
+
+        ret = sys_lsetxattr (path, GFID_XATTR_KEY, uuid_req, 16, XATTR_CREATE);
+
+out:
+        return ret;
+}
+
+
+int
+posix_set_file_contents (xlator_t *this, char *real_path,
+                         data_pair_t *trav, int flags)
+{
+        char *      key                        = NULL;
+        char        real_filepath[ZR_PATH_MAX] = {0,};
+        int32_t     file_fd                    = -1;
+        int         op_ret                     = 0;
+        int         ret                        = -1;
+
+        key = &(trav->key[15]);
+        sprintf (real_filepath, "%s/%s", real_path, key);
+
+        if (flags & XATTR_REPLACE) {
+                /* if file exists, replace it
+                 * else, error out */
+                file_fd = open (real_filepath, O_TRUNC|O_WRONLY);
+
+                if (file_fd == -1) {
+                        goto create;
+                }
+
+                if (trav->value->len) {
+                        ret = write (file_fd, trav->value->data,
+                                     trav->value->len);
+                        if (ret == -1) {
+                                op_ret = -errno;
+                                gf_log (this->name, GF_LOG_ERROR,
+                                        "write failed while doing setxattr "
+                                        "for key %s on path %s: %s",
+                                        key, real_filepath, strerror (errno));
+                                goto out;
+                        }
+
+                        ret = close (file_fd);
+                        if (ret == -1) {
+                                op_ret = -errno;
+                                gf_log (this->name, GF_LOG_ERROR,
+                                        "close failed on %s: %s",
+                                        real_filepath, strerror (errno));
+                                goto out;
+                        }
+                }
+
+        create: /* we know file doesn't exist, create it */
+
+                file_fd = open (real_filepath, O_CREAT|O_WRONLY, 0644);
+
+                if (file_fd == -1) {
+                        op_ret = -errno;
+                        gf_log (this->name, GF_LOG_ERROR,
+                                "failed to open file %s with O_CREAT: %s",
+                                key, strerror (errno));
+                        goto out;
+                }
+
+                ret = write (file_fd, trav->value->data, trav->value->len);
+                if (ret == -1) {
+                        op_ret = -errno;
+                        gf_log (this->name, GF_LOG_ERROR,
+                                "write failed on %s while setxattr with "
+                                "key %s: %s",
+                                real_filepath, key, strerror (errno));
+                        goto out;
+                }
+
+                ret = close (file_fd);
+                if (ret == -1) {
+                        op_ret = -errno;
+                        gf_log (this->name, GF_LOG_ERROR,
+                                "close failed on %s while setxattr with "
+                                "key %s: %s",
+                                real_filepath, key, strerror (errno));
+                        goto out;
+                }
+        }
+
+out:
+        return op_ret;
+}
+
+
+int
+posix_get_file_contents (xlator_t *this, char *real_path,
+                         const char *name, char **contents)
+{
+        char        real_filepath[ZR_PATH_MAX] = {0,};
+        char *      key                        = NULL;
+        int32_t     file_fd                    = -1;
+        struct iatt stbuf                      = {0,};
+        int         op_ret                     = 0;
+        int         ret                        = -1;
+
+        key = (char *) &(name[15]);
+        sprintf (real_filepath, "%s/%s", real_path, key);
+
+        op_ret = posix_lstat_with_gfid (this, real_filepath, &stbuf);
+        if (op_ret == -1) {
+                op_ret = -errno;
+                gf_log (this->name, GF_LOG_ERROR, "lstat failed on %s: %s",
+                        real_filepath, strerror (errno));
+                goto out;
+        }
+
+        file_fd = open (real_filepath, O_RDONLY);
+
+        if (file_fd == -1) {
+                op_ret = -errno;
+                gf_log (this->name, GF_LOG_ERROR, "open failed on %s: %s",
+                        real_filepath, strerror (errno));
+                goto out;
+        }
+
+        *contents = GF_CALLOC (stbuf.ia_size + 1, sizeof(char),
+                               gf_posix_mt_char);
+        if (! *contents) {
+                op_ret = -errno;
+                goto out;
+        }
+
+        ret = read (file_fd, *contents, stbuf.ia_size);
+        if (ret <= 0) {
+                op_ret = -1;
+                gf_log (this->name, GF_LOG_ERROR, "read on %s failed: %s",
+                        real_filepath, strerror (errno));
+                goto out;
+        }
+
+        *contents[stbuf.ia_size] = '\0';
+
+        op_ret = close (file_fd);
+        file_fd = -1;
+        if (op_ret == -1) {
+                op_ret = -errno;
+                gf_log (this->name, GF_LOG_ERROR, "close on %s failed: %s",
+                        real_filepath, strerror (errno));
+                goto out;
+        }
+
+out:
+        if (op_ret < 0) {
+                if (*contents)
+                        GF_FREE (*contents);
+                if (file_fd != -1)
+                        close (file_fd);
+        }
+
+        return op_ret;
+}
+
+static int gf_xattr_enotsup_log;
+
+int
+posix_handle_pair (xlator_t *this, char *real_path,
+                   data_pair_t *trav, int flags)
+{
+        int sys_ret = -1;
+        int ret     = 0;
+
+        if (ZR_FILE_CONTENT_REQUEST(trav->key)) {
+                ret = posix_set_file_contents (this, real_path, trav, flags);
+        } else {
+                sys_ret = sys_lsetxattr (real_path, trav->key,
+                                         trav->value->data,
+                                         trav->value->len, flags);
+
+                if (sys_ret < 0) {
+                        if (errno == ENOTSUP) {
+                                GF_LOG_OCCASIONALLY(gf_xattr_enotsup_log,
+                                                    this->name,GF_LOG_WARNING,
+                                                    "Extended attributes not "
+                                                    "supported");
+                        } else if (errno == ENOENT) {
+                                gf_log (this->name, GF_LOG_ERROR,
+                                        "setxattr on %s failed: %s", real_path,
+                                        strerror (errno));
+                        } else {
+
+#ifdef GF_DARWIN_HOST_OS
+                                gf_log (this->name,
+                                        ((errno == EINVAL) ?
+                                         GF_LOG_DEBUG : GF_LOG_ERROR),
+                                        "%s: key:%s error:%s",
+                                        real_path, trav->key,
+                                        strerror (errno));
+#else /* ! DARWIN */
+                                gf_log (this->name, GF_LOG_ERROR,
+                                        "%s: key:%s error:%s",
+                                        real_path, trav->key,
+                                        strerror (errno));
+#endif /* DARWIN */
+                        }
+
+                        ret = -errno;
+                        goto out;
+                }
+        }
+out:
+        return ret;
+}
+
+int
+posix_fhandle_pair (xlator_t *this, int fd,
+                    data_pair_t *trav, int flags)
+{
+        int sys_ret = -1;
+        int ret     = 0;
+
+        sys_ret = sys_fsetxattr (fd, trav->key, trav->value->data,
+                                 trav->value->len, flags);
+
+        if (sys_ret < 0) {
+                if (errno == ENOTSUP) {
+                        GF_LOG_OCCASIONALLY(gf_xattr_enotsup_log,
+                                            this->name,GF_LOG_WARNING,
+                                            "Extended attributes not "
+                                            "supported");
+                } else if (errno == ENOENT) {
+                        gf_log (this->name, GF_LOG_ERROR,
+                                "fsetxattr on fd=%d failed: %s", fd,
+                                strerror (errno));
+                } else {
+
+#ifdef GF_DARWIN_HOST_OS
+                        gf_log (this->name,
+                                ((errno == EINVAL) ?
+                                 GF_LOG_DEBUG : GF_LOG_ERROR),
+                                "fd=%d: key:%s error:%s",
+                                fd, trav->key,
+                                strerror (errno));
+#else /* ! DARWIN */
+                        gf_log (this->name, GF_LOG_ERROR,
+                                "fd=%d: key:%s error:%s",
+                                fd, trav->key,
+                                strerror (errno));
+#endif /* DARWIN */
+                }
+
+                ret = -errno;
+                goto out;
+        }
+
+out:
+        return ret;
+}
+
+
+static int
+janitor_walker (const char *fpath, const struct stat *sb,
+                int typeflag, struct FTW *ftwbuf)
+{
+        switch (sb->st_mode & S_IFMT) {
+        case S_IFREG:
+        case S_IFBLK:
+        case S_IFLNK:
+        case S_IFCHR:
+        case S_IFIFO:
+        case S_IFSOCK:
+                gf_log (THIS->name, GF_LOG_TRACE,
+                        "unlinking %s", fpath);
+                unlink (fpath);
+                break;
+
+        case S_IFDIR:
+                if (ftwbuf->level) { /* don't remove top level dir */
+                        gf_log (THIS->name, GF_LOG_TRACE,
+                                "removing directory %s", fpath);
+
+                        rmdir (fpath);
+                }
+                break;
+        }
+
+        return 0;   /* 0 = FTW_CONTINUE */
+}
+
+
+static struct posix_fd *
+janitor_get_next_fd (xlator_t *this)
+{
+        struct posix_private *priv = NULL;
+        struct posix_fd *pfd = NULL;
+
+        struct timespec timeout;
+
+        priv = this->private;
+
+        pthread_mutex_lock (&priv->janitor_lock);
+        {
+                if (list_empty (&priv->janitor_fds)) {
+                        time (&timeout.tv_sec);
+                        timeout.tv_sec += priv->janitor_sleep_duration;
+                        timeout.tv_nsec = 0;
+
+                        pthread_cond_timedwait (&priv->janitor_cond,
+                                                &priv->janitor_lock,
+                                                &timeout);
+                        goto unlock;
+                }
+
+                pfd = list_entry (priv->janitor_fds.next, struct posix_fd,
+                                  list);
+
+                list_del (priv->janitor_fds.next);
+        }
+unlock:
+        pthread_mutex_unlock (&priv->janitor_lock);
+
+        return pfd;
+}
+
+
+static void *
+posix_janitor_thread_proc (void *data)
+{
+        xlator_t *            this = NULL;
+        struct posix_private *priv = NULL;
+        struct posix_fd *pfd;
+
+        time_t now;
+
+        this = data;
+        priv = this->private;
+
+        THIS = this;
+
+        while (1) {
+                time (&now);
+                if ((now - priv->last_landfill_check) > priv->janitor_sleep_duration) {
+                        gf_log (this->name, GF_LOG_TRACE,
+                                "janitor cleaning out /" GF_REPLICATE_TRASH_DIR);
+
+                        nftw (priv->trash_path,
+                              janitor_walker,
+                              32,
+                              FTW_DEPTH | FTW_PHYS);
+
+                        priv->last_landfill_check = now;
+                }
+
+                pfd = janitor_get_next_fd (this);
+                if (pfd) {
+                        if (pfd->dir == NULL) {
+                                gf_log (this->name, GF_LOG_TRACE,
+                                        "janitor: closing file fd=%d", pfd->fd);
+                                close (pfd->fd);
+                        } else {
+                                gf_log (this->name, GF_LOG_TRACE,
+                                        "janitor: closing dir fd=%p", pfd->dir);
+                                closedir (pfd->dir);
+                        }
+
+                        if (pfd->path)
+                                GF_FREE (pfd->path);
+
+                        GF_FREE (pfd);
+                }
+        }
+
+        return NULL;
+}
+
+
+void
+posix_spawn_janitor_thread (xlator_t *this)
+{
+        struct posix_private *priv = NULL;
+        int ret = 0;
+
+        priv = this->private;
+
+        LOCK (&priv->lock);
+        {
+                if (!priv->janitor_present) {
+                        ret = pthread_create (&priv->janitor, NULL,
+                                              posix_janitor_thread_proc, this);
+
+                        if (ret < 0) {
+                                gf_log (this->name, GF_LOG_ERROR,
+                                        "spawning janitor thread failed: %s",
+                                        strerror (errno));
+                                goto unlock;
+                        }
+
+                        priv->janitor_present = _gf_true;
+                }
+        }
+unlock:
+        UNLOCK (&priv->lock);
+}
+
+static int
+is_fresh_file (struct stat *stat)
+{
+        struct timeval tv;
+
+        gettimeofday (&tv, NULL);
+
+        if ((stat->st_ctime >= (tv.tv_sec - 1))
+            && (stat->st_ctime <= tv.tv_sec))
+                return 1;
+
+        return 0;
+}
+
+
+int
+posix_gfid_heal (xlator_t *this, const char *path, dict_t *xattr_req)
+{
+        /* The purpose of this function is to prevent a race
+           where an inode creation FOP (like mkdir/mknod/create etc)
+           races with lookup in the following way:
+
+                   {create thread}       |    {lookup thread}
+                                         |
+                                         t0
+                      mkdir ("name")     |
+                                         t1
+                                         |     posix_gfid_set ("name", 2);
+                                         t2
+             posix_gfid_set ("name", 1); |
+                                         t3
+                      lstat ("name");    |     lstat ("name");
+
+          In the above case mkdir FOP would have resulted with GFID 2 while
+          it should have been GFID 1. It matters in the case where GFID would
+          have gotten set to 1 on other subvolumes of replciate/distribute
+
+          The "solution" here is that, if we detect lookup is attempting to
+          set a GFID on a file which is created very recently, but does not
+          yet have a GFID (i.e, between t1 and t2), then "fake" it as though
+          posix_gfid_heal was called at t0 instead.
+        */
+
+        uuid_t       uuid_curr;
+        int          ret = 0;
+        struct stat  stat = {0, };
+
+        if (!xattr_req)
+                goto out;
+
+        if (sys_lstat (path, &stat) != 0)
+                goto out;
+
+        ret = sys_lgetxattr (path, GFID_XATTR_KEY, uuid_curr, 16);
+        if (ret != 16) {
+                if (is_fresh_file (&stat)) {
+                        ret = -1;
+                        errno = ENOENT;
+                        goto out;
+                }
+        }
+
+        ret = posix_gfid_set (this, path, xattr_req);
+out:
+        return ret;
+}
+
+
+int
+posix_acl_xattr_set (xlator_t *this, const char *path, dict_t *xattr_req)
+{
+        int          ret = 0;
+        data_t      *data = NULL;
+        struct stat  stat = {0, };
+
+        if (!xattr_req)
+                goto out;
+
+        if (sys_lstat (path, &stat) != 0)
+                goto out;
+
+        data = dict_get (xattr_req, "system.posix_acl_access");
+        if (data) {
+                ret = sys_lsetxattr (path, "system.posix_acl_access",
+                                     data->data, data->len, 0);
+                if (ret != 0)
+                        goto out;
+        }
+
+        data = dict_get (xattr_req, "system.posix_acl_default");
+        if (data) {
+                ret = sys_lsetxattr (path, "system.posix_acl_default",
+                                     data->data, data->len, 0);
+                if (ret != 0)
+                        goto out;
+        }
+
+out:
+        return ret;
+}
+