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-rw-r--r--xlators/storage/posix/src/posix-helpers.c1391
1 files changed, 1391 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..e295f8850
--- /dev/null
+++ b/xlators/storage/posix/src/posix-helpers.c
@@ -0,0 +1,1391 @@
+/*
+ Copyright (c) 2006-2012 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 _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>
+#include <signal.h>
+
+#ifndef GF_BSD_HOST_OS
+#include <alloca.h>
+#endif /* GF_BSD_HOST_OS */
+
+#include "glusterfs.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"
+#include "glusterfs-acl.h"
+#include <fnmatch.h>
+
+char *marker_xattrs[] = {"trusted.glusterfs.quota.*",
+ "trusted.glusterfs.*.xtime",
+ NULL};
+
+static char* posix_ignore_xattrs[] = {
+ "gfid-req",
+ GLUSTERFS_ENTRYLK_COUNT,
+ GLUSTERFS_INODELK_COUNT,
+ GLUSTERFS_POSIXLK_COUNT,
+ NULL
+};
+
+gf_boolean_t
+posix_special_xattr (char **pattern, char *key)
+{
+ int i = 0;
+ gf_boolean_t flag = _gf_false;
+
+ GF_VALIDATE_OR_GOTO ("posix", pattern, out);
+ GF_VALIDATE_OR_GOTO ("posix", key, out);
+
+ for (i = 0; pattern[i]; i++) {
+ if (!fnmatch (pattern[i], key, 0)) {
+ flag = _gf_true;
+ break;
+ }
+ }
+out:
+ return flag;
+}
+
+static gf_boolean_t
+posix_xattr_ignorable (char *key, posix_xattr_filler_t *filler)
+{
+ int i = 0;
+ gf_boolean_t ignore = _gf_false;
+
+ GF_ASSERT (key);
+ if (!key)
+ goto out;
+ for (i = 0; posix_ignore_xattrs[i]; i++) {
+ if (!strcmp (key, posix_ignore_xattrs[i])) {
+ ignore = _gf_true;
+ goto out;
+ }
+ }
+ if ((!strcmp (key, GF_CONTENT_KEY))
+ && (!IA_ISREG (filler->stbuf->ia_type)))
+ ignore = _gf_true;
+out:
+ return ignore;
+}
+
+static int
+_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 (posix_xattr_ignorable (key, filler))
+ goto out;
+ /* 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);
+ GF_FREE (databuf);
+ }
+ } else if (!strcmp (key, GLUSTERFS_OPEN_FD_COUNT)) {
+ loc = filler->loc;
+ if (loc) {
+ ret = dict_set_uint32 (filler->xattr, key,
+ loc->inode->fd_count);
+ 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 -1;
+
+ xattr_size = sys_lgetxattr (filler->real_path, key, value,
+ xattr_size);
+ if (xattr_size <= 0) {
+ gf_log (filler->this->name, GF_LOG_WARNING,
+ "getxattr failed. path: %s, key: %s",
+ filler->real_path, key);
+ GF_FREE (value);
+ return -1;
+ }
+
+ 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);
+ GF_FREE (value);
+ }
+ }
+ }
+out:
+ return 0;
+}
+
+
+int
+posix_fill_gfid_path (xlator_t *this, const char *path, struct iatt *iatt)
+{
+ int ret = 0;
+ ssize_t size = 0;
+
+ if (!iatt)
+ return 0;
+
+ size = sys_lgetxattr (path, GFID_XATTR_KEY, iatt->ia_gfid, 16);
+ /* Return value of getxattr */
+ if ((size == 16) || (size == -1))
+ ret = 0;
+ else
+ ret = size;
+
+ return ret;
+}
+
+
+int
+posix_fill_gfid_fd (xlator_t *this, int fd, struct iatt *iatt)
+{
+ int ret = 0;
+ ssize_t size = 0;
+
+ if (!iatt)
+ return 0;
+
+ size = sys_fgetxattr (fd, GFID_XATTR_KEY, iatt->ia_gfid, 16);
+ /* Return value of getxattr */
+ if ((size == 16) || (size == -1))
+ ret = 0;
+ else
+ ret = size;
+
+ 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 */
+ if (uuid_is_null (buf->ia_gfid)) {
+ buf->ia_ino = -1;
+ goto out;
+ }
+ for (i = 15; i > (15 - 8); i--) {
+ temp_ino += (uint64_t)(buf->ia_gfid[i]) << j;
+ j += 8;
+ }
+ buf->ia_ino = temp_ino;
+out:
+ return;
+}
+
+int
+posix_fdstat (xlator_t *this, int fd, struct iatt *stbuf_p)
+{
+ int ret = 0;
+ struct stat fstatbuf = {0, };
+ struct iatt stbuf = {0, };
+
+ ret = fstat (fd, &fstatbuf);
+ if (ret == -1)
+ goto out;
+
+ if (fstatbuf.st_nlink && !S_ISDIR (fstatbuf.st_mode))
+ fstatbuf.st_nlink--;
+
+ 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;
+}
+
+
+int
+posix_istat (xlator_t *this, uuid_t gfid, const char *basename,
+ struct iatt *buf_p)
+{
+ char *real_path = NULL;
+ struct stat lstatbuf = {0, };
+ struct iatt stbuf = {0, };
+ int ret = 0;
+ struct posix_private *priv = NULL;
+
+
+ priv = this->private;
+
+ MAKE_HANDLE_PATH (real_path, this, gfid, basename);
+
+ ret = lstat (real_path, &lstatbuf);
+
+ if (ret != 0) {
+ if (ret == -1) {
+ if (errno != ENOENT && errno != ELOOP)
+ gf_log (this->name, GF_LOG_WARNING,
+ "lstat failed on %s (%s)",
+ real_path, strerror (errno));
+ } else {
+ // may be some backend filesystem issue
+ gf_log (this->name, GF_LOG_ERROR, "lstat failed on "
+ "%s and return value is %d instead of -1. "
+ "Please see dmesg output to check whether the "
+ "failure is due to backend filesystem issue",
+ real_path, ret);
+ ret = -1;
+ }
+ goto out;
+ }
+
+ if ((lstatbuf.st_ino == priv->handledir.st_ino) &&
+ (lstatbuf.st_dev == priv->handledir.st_dev)) {
+ errno = ENOENT;
+ return -1;
+ }
+
+ if (!S_ISDIR (lstatbuf.st_mode))
+ lstatbuf.st_nlink --;
+
+ iatt_from_stat (&stbuf, &lstatbuf);
+
+ if (basename)
+ posix_fill_gfid_path (this, real_path, &stbuf);
+ else
+ uuid_copy (stbuf.ia_gfid, gfid);
+
+ posix_fill_ino_from_gfid (this, &stbuf);
+
+ if (buf_p)
+ *buf_p = stbuf;
+out:
+ return ret;
+}
+
+
+
+int
+posix_pstat (xlator_t *this, uuid_t gfid, const char *path,
+ struct iatt *buf_p)
+{
+ struct stat lstatbuf = {0, };
+ struct iatt stbuf = {0, };
+ int ret = 0;
+ struct posix_private *priv = NULL;
+
+
+ priv = this->private;
+
+ ret = lstat (path, &lstatbuf);
+
+ if (ret != 0) {
+ if (ret == -1) {
+ if (errno != ENOENT)
+ gf_log (this->name, GF_LOG_WARNING,
+ "lstat failed on %s (%s)",
+ path, strerror (errno));
+ } else {
+ // may be some backend filesytem issue
+ gf_log (this->name, GF_LOG_ERROR, "lstat failed on "
+ "%s and return value is %d instead of -1. "
+ "Please see dmesg output to check whether the "
+ "failure is due to backend filesystem issue",
+ path, ret);
+ ret = -1;
+ }
+ goto out;
+ }
+
+ if ((lstatbuf.st_ino == priv->handledir.st_ino) &&
+ (lstatbuf.st_dev == priv->handledir.st_dev)) {
+ errno = ENOENT;
+ return -1;
+ }
+
+ if (!S_ISDIR (lstatbuf.st_mode))
+ lstatbuf.st_nlink --;
+
+ iatt_from_stat (&stbuf, &lstatbuf);
+
+ if (gfid && !uuid_is_null (gfid))
+ uuid_copy (stbuf.ia_gfid, gfid);
+ else
+ posix_fill_gfid_path (this, path, &stbuf);
+
+ posix_fill_ino_from_gfid (this, &stbuf);
+
+ if (buf_p)
+ *buf_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;
+}
+
+
+int
+posix_gfid_set (xlator_t *this, const char *path, loc_t *loc, dict_t *xattr_req)
+{
+ void *uuid_req = NULL;
+ uuid_t uuid_curr;
+ int ret = 0;
+ ssize_t size = 0;
+ struct stat stat = {0, };
+
+
+ if (!xattr_req)
+ goto out;
+
+ if (sys_lstat (path, &stat) != 0)
+ goto out;
+
+ size = sys_lgetxattr (path, GFID_XATTR_KEY, uuid_curr, 16);
+ if (size == 16) {
+ ret = 0;
+ goto verify_handle;
+ }
+
+ ret = dict_get_ptr (xattr_req, "gfid-req", &uuid_req);
+ if (ret) {
+ gf_log (this->name, GF_LOG_DEBUG,
+ "failed to get the gfid from dict for %s",
+ loc->path);
+ goto out;
+ }
+
+ ret = sys_lsetxattr (path, GFID_XATTR_KEY, uuid_req, 16, XATTR_CREATE);
+ if (ret != 0) {
+ gf_log (this->name, GF_LOG_WARNING,
+ "setting GFID on %s failed (%s)", path,
+ strerror (errno));
+ goto out;
+ }
+ uuid_copy (uuid_curr, uuid_req);
+
+verify_handle:
+ if (!S_ISDIR (stat.st_mode))
+ ret = posix_handle_hard (this, path, uuid_curr, &stat);
+ else
+ ret = posix_handle_soft (this, path, loc, uuid_curr, &stat);
+
+out:
+ return ret;
+}
+
+
+int
+posix_set_file_contents (xlator_t *this, const char *path, char *keyp,
+ data_t *value, int flags)
+{
+ char * key = NULL;
+ char real_path[PATH_MAX];
+ int32_t file_fd = -1;
+ int op_ret = 0;
+ int ret = -1;
+
+
+ /* XXX: does not handle assigning GFID to created files */
+ return -1;
+
+ key = &(keyp[15]);
+ sprintf (real_path, "%s/%s", path, key);
+
+ if (flags & XATTR_REPLACE) {
+ /* if file exists, replace it
+ * else, error out */
+ file_fd = open (real_path, O_TRUNC|O_WRONLY);
+
+ if (file_fd == -1) {
+ goto create;
+ }
+
+ if (value->len) {
+ ret = write (file_fd, value->data, 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_path, 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_path, strerror (errno));
+ goto out;
+ }
+ }
+
+ create: /* we know file doesn't exist, create it */
+
+ file_fd = open (real_path, 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, value->data, 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_path, 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_path, key, strerror (errno));
+ goto out;
+ }
+ }
+
+out:
+ return op_ret;
+}
+
+
+int
+posix_get_file_contents (xlator_t *this, uuid_t pargfid,
+ const char *name, char **contents)
+{
+ char *real_path = NULL;
+ int32_t file_fd = -1;
+ struct iatt stbuf = {0,};
+ int op_ret = 0;
+ int ret = -1;
+
+
+ MAKE_HANDLE_PATH (real_path, this, pargfid, name);
+
+ op_ret = posix_istat (this, pargfid, name, &stbuf);
+ if (op_ret == -1) {
+ op_ret = -errno;
+ gf_log (this->name, GF_LOG_ERROR, "lstat failed on %s: %s",
+ real_path, strerror (errno));
+ goto out;
+ }
+
+ file_fd = open (real_path, O_RDONLY);
+
+ if (file_fd == -1) {
+ op_ret = -errno;
+ gf_log (this->name, GF_LOG_ERROR, "open failed on %s: %s",
+ real_path, 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_path, 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_path, strerror (errno));
+ goto out;
+ }
+
+out:
+ if (op_ret < 0) {
+ 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, const char *real_path,
+ char *key, data_t *value, int flags)
+{
+ int sys_ret = -1;
+ int ret = 0;
+
+ if (ZR_FILE_CONTENT_REQUEST(key)) {
+ ret = posix_set_file_contents (this, real_path, key, value,
+ flags);
+ } else {
+ sys_ret = sys_lsetxattr (real_path, key, value->data,
+ 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 (try remounting "
+ "brick with 'user_xattr' "
+ "flag)");
+ } else if (errno == ENOENT) {
+ if (!posix_special_xattr (marker_xattrs,
+ key)) {
+ 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, key,
+ strerror (errno));
+#else /* ! DARWIN */
+ gf_log (this->name, GF_LOG_ERROR,
+ "%s: key:%s error:%s",
+ real_path, key,
+ strerror (errno));
+#endif /* DARWIN */
+ }
+
+ ret = -errno;
+ goto out;
+ }
+ }
+out:
+ return ret;
+}
+
+int
+posix_fhandle_pair (xlator_t *this, int fd,
+ char *key, data_t *value, int flags)
+{
+ int sys_ret = -1;
+ int ret = 0;
+
+ sys_ret = sys_fsetxattr (fd, key, value->data,
+ 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 (try remounting "
+ "brick with 'user_xattr' "
+ "flag)");
+ } 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, key, strerror (errno));
+#else /* ! DARWIN */
+ gf_log (this->name, GF_LOG_ERROR,
+ "fd=%d: key:%s error:%s",
+ fd, 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)
+{
+ struct iatt stbuf = {0, };
+ xlator_t *this = NULL;
+
+ this = THIS;
+ posix_pstat (this, NULL, fpath, &stbuf);
+ 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);
+ if (stbuf.ia_nlink == 1)
+ posix_handle_unset (this, stbuf.ia_gfid, NULL);
+ 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);
+ posix_handle_unset (this, stbuf.ia_gfid, NULL);
+ }
+ 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 %s", priv->trash_path);
+
+ 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);
+ }
+
+ 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 = gf_thread_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, loc_t *loc, 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, loc, 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, POSIX_ACL_ACCESS_XATTR);
+ if (data) {
+ ret = sys_lsetxattr (path, POSIX_ACL_ACCESS_XATTR,
+ data->data, data->len, 0);
+ if (ret != 0)
+ goto out;
+ }
+
+ data = dict_get (xattr_req, POSIX_ACL_DEFAULT_XATTR);
+ if (data) {
+ ret = sys_lsetxattr (path, POSIX_ACL_DEFAULT_XATTR,
+ data->data, data->len, 0);
+ if (ret != 0)
+ goto out;
+ }
+
+out:
+ return ret;
+}
+
+static int
+_handle_entry_create_keyvalue_pair (dict_t *d, char *k, data_t *v,
+ void *tmp)
+{
+ int ret = -1;
+ posix_xattr_filler_t *filler = NULL;
+
+ filler = tmp;
+
+ if (!strcmp (GFID_XATTR_KEY, k) ||
+ !strcmp ("gfid-req", k) ||
+ !strcmp (POSIX_ACL_DEFAULT_XATTR, k) ||
+ !strcmp (POSIX_ACL_ACCESS_XATTR, k) ||
+ ZR_FILE_CONTENT_REQUEST(k)) {
+ return 0;
+ }
+
+ ret = posix_handle_pair (filler->this, filler->real_path, k, v,
+ XATTR_CREATE);
+ if (ret < 0) {
+ errno = -ret;
+ return -1;
+ }
+ return 0;
+}
+
+int
+posix_entry_create_xattr_set (xlator_t *this, const char *path,
+ dict_t *dict)
+{
+ int ret = -1;
+
+ posix_xattr_filler_t filler = {0,};
+
+ if (!dict)
+ goto out;
+
+ filler.this = this;
+ filler.real_path = path;
+
+ ret = dict_foreach (dict, _handle_entry_create_keyvalue_pair, &filler);
+
+out:
+ return ret;
+}
+
+
+static int
+__posix_fd_ctx_get (fd_t *fd, xlator_t *this, struct posix_fd **pfd_p)
+{
+ uint64_t tmp_pfd = 0;
+ struct posix_fd *pfd = NULL;
+ int ret = -1;
+ char *real_path = NULL;
+ int _fd = -1;
+ DIR *dir = NULL;
+
+ ret = __fd_ctx_get (fd, this, &tmp_pfd);
+ if (ret == 0) {
+ pfd = (void *)(long) tmp_pfd;
+ ret = 0;
+ goto out;
+ }
+
+ if (!fd_is_anonymous(fd))
+ /* anonymous fd */
+ goto out;
+
+ MAKE_HANDLE_PATH (real_path, this, fd->inode->gfid, NULL);
+
+ pfd = GF_CALLOC (1, sizeof (*pfd), gf_posix_mt_posix_fd);
+ if (!pfd) {
+ goto out;
+ }
+ pfd->fd = -1;
+
+ if (fd->inode->ia_type == IA_IFDIR) {
+ dir = opendir (real_path);
+ if (!dir) {
+ GF_FREE (pfd);
+ pfd = NULL;
+ goto out;
+ }
+ _fd = dirfd (dir);
+ }
+
+ if (fd->inode->ia_type == IA_IFREG) {
+ _fd = open (real_path, O_RDWR|O_LARGEFILE);
+ if (_fd == -1) {
+ GF_FREE (pfd);
+ pfd = NULL;
+ goto out;
+ }
+ }
+
+ pfd->fd = _fd;
+ pfd->dir = dir;
+
+ ret = __fd_ctx_set (fd, this, (uint64_t) (long) pfd);
+ if (ret != 0) {
+ if (_fd != -1)
+ close (_fd);
+ if (dir)
+ closedir (dir);
+ GF_FREE (pfd);
+ pfd = NULL;
+ goto out;
+ }
+
+ ret = 0;
+out:
+ if (pfd_p)
+ *pfd_p = pfd;
+ return ret;
+}
+
+
+int
+posix_fd_ctx_get (fd_t *fd, xlator_t *this, struct posix_fd **pfd)
+{
+ int ret;
+
+ LOCK (&fd->inode->lock);
+ {
+ ret = __posix_fd_ctx_get (fd, this, pfd);
+ }
+ UNLOCK (&fd->inode->lock);
+
+ return ret;
+}
+
+static void *
+posix_health_check_thread_proc (void *data)
+{
+ xlator_t *this = NULL;
+ struct posix_private *priv = NULL;
+ uint32_t interval = 0;
+ int ret = -1;
+ struct stat sb = {0, };
+
+ this = data;
+ priv = this->private;
+
+ /* prevent races when the interval is updated */
+ interval = priv->health_check_interval;
+ if (interval == 0)
+ goto out;
+
+ gf_log (this->name, GF_LOG_DEBUG, "health-check thread started, "
+ "interval = %d seconds", interval);
+
+ while (1) {
+ /* aborting sleep() is a request to exit this thread, sleep()
+ * will normally not return when cancelled */
+ ret = sleep (interval);
+ if (ret > 0)
+ break;
+
+ /* prevent thread errors while doing the health-check(s) */
+ pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, NULL);
+
+ /* Do the health-check, it should be moved to its own function
+ * in case it gets more complex. */
+ ret = stat (priv->base_path, &sb);
+ if (ret < 0) {
+ gf_log (this->name, GF_LOG_WARNING,
+ "stat() on %s returned: %s", priv->base_path,
+ strerror (errno));
+ goto abort;
+ }
+
+ pthread_setcancelstate (PTHREAD_CANCEL_ENABLE, NULL);
+ }
+
+out:
+ gf_log (this->name, GF_LOG_DEBUG, "health-check thread exiting");
+
+ LOCK (&priv->lock);
+ {
+ priv->health_check_active = _gf_false;
+ }
+ UNLOCK (&priv->lock);
+
+ return NULL;
+
+abort:
+ /* health-check failed */
+ gf_log (this->name, GF_LOG_EMERG, "health-check failed, going down");
+ xlator_notify (this->parents->xlator, GF_EVENT_CHILD_DOWN, this);
+
+ ret = sleep (30);
+ if (ret == 0) {
+ gf_log (this->name, GF_LOG_EMERG, "still alive! -> SIGTERM");
+ kill (getpid(), SIGTERM);
+ }
+
+ ret = sleep (30);
+ if (ret == 0) {
+ gf_log (this->name, GF_LOG_EMERG, "still alive! -> SIGKILL");
+ kill (getpid(), SIGKILL);
+ }
+
+ return NULL;
+}
+
+void
+posix_spawn_health_check_thread (xlator_t *xl)
+{
+ struct posix_private *priv = NULL;
+ int ret = -1;
+
+ priv = xl->private;
+
+ LOCK (&priv->lock);
+ {
+ /* cancel the running thread */
+ if (priv->health_check_active == _gf_true) {
+ pthread_cancel (priv->health_check);
+ priv->health_check_active = _gf_false;
+ }
+
+ /* prevent scheduling a check in a tight loop */
+ if (priv->health_check_interval == 0)
+ goto unlock;
+
+ ret = gf_thread_create (&priv->health_check, NULL,
+ posix_health_check_thread_proc, xl);
+ if (ret < 0) {
+ priv->health_check_interval = 0;
+ priv->health_check_active = _gf_false;
+ gf_log (xl->name, GF_LOG_ERROR,
+ "unable to setup health-check thread: %s",
+ strerror (errno));
+ goto unlock;
+ }
+
+ /* run the thread detached, resources will be freed on exit */
+ pthread_detach (priv->health_check);
+ priv->health_check_active = _gf_true;
+ }
+unlock:
+ UNLOCK (&priv->lock);
+}
+
+int
+posix_fsyncer_pick (xlator_t *this, struct list_head *head)
+{
+ struct posix_private *priv = NULL;
+ int count = 0;
+
+ priv = this->private;
+ pthread_mutex_lock (&priv->fsync_mutex);
+ {
+ while (list_empty (&priv->fsyncs))
+ pthread_cond_wait (&priv->fsync_cond,
+ &priv->fsync_mutex);
+
+ count = priv->fsync_queue_count;
+ priv->fsync_queue_count = 0;
+ list_splice_init (&priv->fsyncs, head);
+ }
+ pthread_mutex_unlock (&priv->fsync_mutex);
+
+ return count;
+}
+
+
+void
+posix_fsyncer_process (xlator_t *this, call_stub_t *stub, gf_boolean_t do_fsync)
+{
+ struct posix_fd *pfd = NULL;
+ int ret = -1;
+ struct posix_private *priv = NULL;
+
+ priv = this->private;
+
+ ret = posix_fd_ctx_get (stub->args.fd, this, &pfd);
+ if (ret < 0) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "could not get fdctx for fd(%s)",
+ uuid_utoa (stub->args.fd->inode->gfid));
+ call_unwind_error (stub, -1, EINVAL);
+ return;
+ }
+
+ if (do_fsync) {
+#ifdef HAVE_FDATASYNC
+ if (stub->args.datasync)
+ ret = fdatasync (pfd->fd);
+ else
+#endif
+ ret = fsync (pfd->fd);
+ } else {
+ ret = 0;
+ }
+
+ if (ret) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "could not fstat fd(%s)",
+ uuid_utoa (stub->args.fd->inode->gfid));
+ call_unwind_error (stub, -1, errno);
+ return;
+ }
+
+ call_unwind_error (stub, 0, 0);
+}
+
+
+static void
+posix_fsyncer_syncfs (xlator_t *this, struct list_head *head)
+{
+ call_stub_t *stub = NULL;
+ struct posix_fd *pfd = NULL;
+ int ret = -1;
+
+ stub = list_entry (head->prev, call_stub_t, list);
+ ret = posix_fd_ctx_get (stub->args.fd, this, &pfd);
+ if (ret)
+ return;
+
+#ifdef GF_LINUX_HOST_OS
+ /* syncfs() is not "declared" in RHEL's glibc even though
+ the kernel has support.
+ */
+#include <sys/syscall.h>
+#include <unistd.h>
+#ifdef SYS_syncfs
+ syscall (SYS_syncfs, pfd->fd);
+#else
+ sync();
+#endif
+#else
+ sync();
+#endif
+}
+
+
+void *
+posix_fsyncer (void *d)
+{
+ xlator_t *this = d;
+ struct posix_private *priv = NULL;
+ call_stub_t *stub = NULL;
+ call_stub_t *tmp = NULL;
+ struct list_head list;
+ int count = 0;
+ gf_boolean_t do_fsync = _gf_true;
+
+ priv = this->private;
+
+ for (;;) {
+ INIT_LIST_HEAD (&list);
+
+ count = posix_fsyncer_pick (this, &list);
+
+ usleep (priv->batch_fsync_delay_usec);
+
+ gf_log (this->name, GF_LOG_DEBUG,
+ "picked %d fsyncs", count);
+
+ switch (priv->batch_fsync_mode) {
+ case BATCH_NONE:
+ case BATCH_REVERSE_FSYNC:
+ break;
+ case BATCH_SYNCFS:
+ case BATCH_SYNCFS_SINGLE_FSYNC:
+ case BATCH_SYNCFS_REVERSE_FSYNC:
+ posix_fsyncer_syncfs (this, &list);
+ break;
+ }
+
+ if (priv->batch_fsync_mode == BATCH_SYNCFS)
+ do_fsync = _gf_false;
+ else
+ do_fsync = _gf_true;
+
+ list_for_each_entry_safe_reverse (stub, tmp, &list, list) {
+ list_del_init (&stub->list);
+
+ posix_fsyncer_process (this, stub, do_fsync);
+
+ if (priv->batch_fsync_mode == BATCH_SYNCFS_SINGLE_FSYNC)
+ do_fsync = _gf_false;
+ }
+ }
+}
generated by cgit (git 2.34.1) at 2026-01-04 06:21:10 +0000