mirrors/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-05-06 11:26:22 -04:00
Code Issues Packages Projects Releases Wiki Activity

staging/lustre/obdclass: remove unused file llog_lvfs.c

Browse Source 
This contains server-side llog operations.
Also remove declaration of public structure from lustre_log.h

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Oleg Drokin
2014-08-28 14:54:21 -04:00
committed by Greg Kroah-Hartman
parent bb21ed1543
commit ff9b828252
2 changed files with 0 additions and 852 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/staging/lustre/lustre/include/lustre_log.h
View File

@@ -315,9 +315,6 @@ struct llog_handle {
atomic_t lgh_refcount;
};
/* llog_lvfs.c */
extern struct llog_operations llog_lvfs_ops;
/* llog_osd.c */
extern struct llog_operations llog_osd_ops;
int llog_osd_get_cat_list(const struct lu_env *env, struct dt_device *d,

849
drivers/staging/lustre/lustre/obdclass/llog_lvfs.c
View File

@@ -1,849 +0,0 @@
/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 only,
* as published by the Free Software Foundation.
*
* This program 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 version 2 for more details (a copy is included
* in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
* http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
* GPL HEADER END
*/
/*
* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2011, 2012, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*
* lustre/obdclass/llog_lvfs.c
*
* OST<->MDS recovery logging infrastructure.
* Invariants in implementation:
* - we do not share logs among different OST<->MDS connections, so that
* if an OST or MDS fails it need only look at log(s) relevant to itself
*
* Author: Andreas Dilger <adilger@clusterfs.com>
*/
#define DEBUG_SUBSYSTEM S_LOG
#include "../include/obd.h"
#include "../include/obd_class.h"
#include "../include/lustre_log.h"
#include "../include/obd_ost.h"
#include <linux/list.h>
#include "../include/lvfs.h"
#include "../include/lustre_fsfilt.h"
#include "../include/lustre_disk.h"
#include "llog_internal.h"
#if defined(LLOG_LVFS)
static int llog_lvfs_pad(struct obd_device *obd, struct file *file, int len,
int index)
{
struct llog_rec_hdr rec = { 0 };
struct llog_rec_tail tail;
int rc;
LASSERT(len >= LLOG_MIN_REC_SIZE && (len & 0x7) == 0);
tail.lrt_len = rec.lrh_len = len;
tail.lrt_index = rec.lrh_index = index;
rec.lrh_type = LLOG_PAD_MAGIC;
rc = fsfilt_write_record(obd, file, &rec, sizeof(rec), &file->f_pos, 0);
if (rc) {
CERROR("error writing padding record: rc %d\n", rc);
goto out;
}
file->f_pos += len - sizeof(rec) - sizeof(tail);
rc = fsfilt_write_record(obd, file, &tail, sizeof(tail),
&file->f_pos, 0);
if (rc) {
CERROR("error writing padding record: rc %d\n", rc);
goto out;
}
out:
return rc;
}
static int llog_lvfs_write_blob(struct obd_device *obd, struct file *file,
struct llog_rec_hdr *rec, void *buf, loff_t off)
{
int rc;
struct llog_rec_tail end;
loff_t saved_off = file->f_pos;
int buflen = rec->lrh_len;
file->f_pos = off;
if (buflen == 0)
CWARN("0-length record\n");
if (!buf) {
rc = fsfilt_write_record(obd, file, rec, buflen,
&file->f_pos, 0);
if (rc) {
CERROR("error writing log record: rc %d\n", rc);
goto out;
}
GOTO(out, rc = 0);
}
/* the buf case */
rec->lrh_len = sizeof(*rec) + buflen + sizeof(end);
rc = fsfilt_write_record(obd, file, rec, sizeof(*rec), &file->f_pos, 0);
if (rc) {
CERROR("error writing log hdr: rc %d\n", rc);
goto out;
}
rc = fsfilt_write_record(obd, file, buf, buflen, &file->f_pos, 0);
if (rc) {
CERROR("error writing log buffer: rc %d\n", rc);
goto out;
}
end.lrt_len = rec->lrh_len;
end.lrt_index = rec->lrh_index;
rc = fsfilt_write_record(obd, file, &end, sizeof(end), &file->f_pos, 0);
if (rc) {
CERROR("error writing log tail: rc %d\n", rc);
goto out;
}
rc = 0;
out:
if (saved_off > file->f_pos)
file->f_pos = saved_off;
LASSERT(rc <= 0);
return rc;
}
static int llog_lvfs_read_blob(struct obd_device *obd, struct file *file,
void *buf, int size, loff_t off)
{
loff_t offset = off;
int rc;
rc = fsfilt_read_record(obd, file, buf, size, &offset);
if (rc) {
CERROR("error reading log record: rc %d\n", rc);
return rc;
}
return 0;
}
static int llog_lvfs_read_header(const struct lu_env *env,
struct llog_handle *handle)
{
struct obd_device *obd;
int rc;
LASSERT(sizeof(*handle->lgh_hdr) == LLOG_CHUNK_SIZE);
obd = handle->lgh_ctxt->loc_exp->exp_obd;
if (i_size_read(handle->lgh_file->f_dentry->d_inode) == 0) {
CDEBUG(D_HA, "not reading header from 0-byte log\n");
return LLOG_EEMPTY;
}
rc = llog_lvfs_read_blob(obd, handle->lgh_file, handle->lgh_hdr,
LLOG_CHUNK_SIZE, 0);
if (rc) {
CERROR("error reading log header from %.*s\n",
handle->lgh_file->f_dentry->d_name.len,
handle->lgh_file->f_dentry->d_name.name);
} else {
struct llog_rec_hdr *llh_hdr = &handle->lgh_hdr->llh_hdr;
if (LLOG_REC_HDR_NEEDS_SWABBING(llh_hdr))
lustre_swab_llog_hdr(handle->lgh_hdr);
if (llh_hdr->lrh_type != LLOG_HDR_MAGIC) {
CERROR("bad log %.*s header magic: %#x (expected %#x)\n",
handle->lgh_file->f_dentry->d_name.len,
handle->lgh_file->f_dentry->d_name.name,
llh_hdr->lrh_type, LLOG_HDR_MAGIC);
rc = -EIO;
} else if (llh_hdr->lrh_len != LLOG_CHUNK_SIZE) {
CERROR("incorrectly sized log %.*s header: %#x "
"(expected %#x)\n",
handle->lgh_file->f_dentry->d_name.len,
handle->lgh_file->f_dentry->d_name.name,
llh_hdr->lrh_len, LLOG_CHUNK_SIZE);
CERROR("you may need to re-run lconf --write_conf.\n");
rc = -EIO;
}
}
handle->lgh_last_idx = handle->lgh_hdr->llh_tail.lrt_index;
handle->lgh_file->f_pos = i_size_read(handle->lgh_file->f_dentry->d_inode);
return rc;
}
/* returns negative in on error; 0 if success && reccookie == 0; 1 otherwise */
/* appends if idx == -1, otherwise overwrites record idx. */
static int llog_lvfs_write_rec(const struct lu_env *env,
struct llog_handle *loghandle,
struct llog_rec_hdr *rec,
struct llog_cookie *reccookie, int cookiecount,
void *buf, int idx, struct thandle *th)
{
struct llog_log_hdr *llh;
int reclen = rec->lrh_len, index, rc;
struct llog_rec_tail *lrt;
struct obd_device *obd;
struct file *file;
size_t left;
llh = loghandle->lgh_hdr;
file = loghandle->lgh_file;
obd = loghandle->lgh_ctxt->loc_exp->exp_obd;
/* record length should not bigger than LLOG_CHUNK_SIZE */
if (buf)
rc = (reclen > LLOG_CHUNK_SIZE - sizeof(struct llog_rec_hdr) -
sizeof(struct llog_rec_tail)) ? -E2BIG : 0;
else
rc = (reclen > LLOG_CHUNK_SIZE) ? -E2BIG : 0;
if (rc)
return rc;
if (buf)
/* write_blob adds header and tail to lrh_len. */
reclen = sizeof(*rec) + rec->lrh_len +
sizeof(struct llog_rec_tail);
if (idx != -1) {
loff_t saved_offset;
/* no header: only allowed to insert record 1 */
if (idx != 1 && !i_size_read(file->f_dentry->d_inode)) {
CERROR("idx != -1 in empty log\n");
LBUG();
}
if (idx && llh->llh_size && llh->llh_size != rec->lrh_len)
return -EINVAL;
if (!ext2_test_bit(idx, llh->llh_bitmap))
CERROR("Modify unset record %u\n", idx);
if (idx != rec->lrh_index)
CERROR("Index mismatch %d %u\n", idx, rec->lrh_index);
rc = llog_lvfs_write_blob(obd, file, &llh->llh_hdr, NULL, 0);
/* we are done if we only write the header or on error */
if (rc || idx == 0)
return rc;
if (buf) {
/* We assume that caller has set lgh_cur_* */
saved_offset = loghandle->lgh_cur_offset;
CDEBUG(D_OTHER,
"modify record "DOSTID": idx:%d/%u/%d, len:%u "
"offset %llu\n",
POSTID(&loghandle->lgh_id.lgl_oi), idx, rec->lrh_index,
loghandle->lgh_cur_idx, rec->lrh_len,
(long long)(saved_offset - sizeof(*llh)));
if (rec->lrh_index != loghandle->lgh_cur_idx) {
CERROR("modify idx mismatch %u/%d\n",
idx, loghandle->lgh_cur_idx);
return -EFAULT;
}
} else {
/* Assumes constant lrh_len */
saved_offset = sizeof(*llh) + (idx - 1) * reclen;
}
rc = llog_lvfs_write_blob(obd, file, rec, buf, saved_offset);
if (rc == 0 && reccookie) {
reccookie->lgc_lgl = loghandle->lgh_id;
reccookie->lgc_index = idx;
rc = 1;
}
return rc;
}
/* Make sure that records don't cross a chunk boundary, so we can
* process them page-at-a-time if needed. If it will cross a chunk
* boundary, write in a fake (but referenced) entry to pad the chunk.
*
* We know that llog_current_log() will return a loghandle that is
* big enough to hold reclen, so all we care about is padding here.
*/
left = LLOG_CHUNK_SIZE - (file->f_pos & (LLOG_CHUNK_SIZE - 1));
/* NOTE: padding is a record, but no bit is set */
if (left != 0 && left != reclen &&
left < (reclen + LLOG_MIN_REC_SIZE)) {
index = loghandle->lgh_last_idx + 1;
rc = llog_lvfs_pad(obd, file, left, index);
if (rc)
return rc;
loghandle->lgh_last_idx++; /*for pad rec*/
}
/* if it's the last idx in log file, then return -ENOSPC */
if (loghandle->lgh_last_idx >= LLOG_BITMAP_SIZE(llh) - 1)
return -ENOSPC;
loghandle->lgh_last_idx++;
index = loghandle->lgh_last_idx;
LASSERT(index < LLOG_BITMAP_SIZE(llh));
rec->lrh_index = index;
if (buf == NULL) {
lrt = (struct llog_rec_tail *)
((char *)rec + rec->lrh_len - sizeof(*lrt));
lrt->lrt_len = rec->lrh_len;
lrt->lrt_index = rec->lrh_index;
}
/*The caller should make sure only 1 process access the lgh_last_idx,
*Otherwise it might hit the assert.*/
LASSERT(index < LLOG_BITMAP_SIZE(llh));
spin_lock(&loghandle->lgh_hdr_lock);
if (ext2_set_bit(index, llh->llh_bitmap)) {
CERROR("argh, index %u already set in log bitmap?\n", index);
spin_unlock(&loghandle->lgh_hdr_lock);
LBUG(); /* should never happen */
}
llh->llh_count++;
spin_unlock(&loghandle->lgh_hdr_lock);
llh->llh_tail.lrt_index = index;
rc = llog_lvfs_write_blob(obd, file, &llh->llh_hdr, NULL, 0);
if (rc)
return rc;
rc = llog_lvfs_write_blob(obd, file, rec, buf, file->f_pos);
if (rc)
return rc;
CDEBUG(D_RPCTRACE, "added record "DOSTID": idx: %u, %u \n",
POSTID(&loghandle->lgh_id.lgl_oi), index, rec->lrh_len);
if (rc == 0 && reccookie) {
reccookie->lgc_lgl = loghandle->lgh_id;
reccookie->lgc_index = index;
if ((rec->lrh_type == MDS_UNLINK_REC) ||
(rec->lrh_type == MDS_SETATTR64_REC))
reccookie->lgc_subsys = LLOG_MDS_OST_ORIG_CTXT;
else if (rec->lrh_type == OST_SZ_REC)
reccookie->lgc_subsys = LLOG_SIZE_ORIG_CTXT;
else
reccookie->lgc_subsys = -1;
rc = 1;
}
if (rc == 0 && rec->lrh_type == LLOG_GEN_REC)
rc = 1;
return rc;
}
/* We can skip reading at least as many log blocks as the number of
* minimum sized log records we are skipping. If it turns out
* that we are not far enough along the log (because the
* actual records are larger than minimum size) we just skip
* some more records. */
static void llog_skip_over(__u64 *off, int curr, int goal)
{
if (goal <= curr)
return;
*off = (*off + (goal-curr-1) * LLOG_MIN_REC_SIZE) &
~(LLOG_CHUNK_SIZE - 1);
}
/* sets:
* - cur_offset to the furthest point read in the log file
* - cur_idx to the log index preceding cur_offset
* returns -EIO/-EINVAL on error
*/
static int llog_lvfs_next_block(const struct lu_env *env,
struct llog_handle *loghandle, int *cur_idx,
int next_idx, __u64 *cur_offset, void *buf,
int len)
{
int rc;
if (len == 0 || len & (LLOG_CHUNK_SIZE - 1))
return -EINVAL;
CDEBUG(D_OTHER, "looking for log index %u (cur idx %u off %llu)\n",
next_idx, *cur_idx, *cur_offset);
while (*cur_offset < i_size_read(loghandle->lgh_file->f_dentry->d_inode)) {
struct llog_rec_hdr *rec, *last_rec;
struct llog_rec_tail *tail;
loff_t ppos;
int llen;
llog_skip_over(cur_offset, *cur_idx, next_idx);
/* read up to next LLOG_CHUNK_SIZE block */
ppos = *cur_offset;
llen = LLOG_CHUNK_SIZE - (*cur_offset & (LLOG_CHUNK_SIZE - 1));
rc = fsfilt_read_record(loghandle->lgh_ctxt->loc_exp->exp_obd,
loghandle->lgh_file, buf, llen,
cur_offset);
if (rc < 0) {
CERROR("Cant read llog block at log id "DOSTID
"/%u offset %llu\n",
POSTID(&loghandle->lgh_id.lgl_oi),
loghandle->lgh_id.lgl_ogen,
*cur_offset);
return rc;
}
/* put number of bytes read into rc to make code simpler */
rc = *cur_offset - ppos;
if (rc < len) {
/* signal the end of the valid buffer to llog_process */
memset(buf + rc, 0, len - rc);
}
if (rc == 0) /* end of file, nothing to do */
return 0;
if (rc < sizeof(*tail)) {
CERROR("Invalid llog block at log id "DOSTID"/%u offset%llu\n",
POSTID(&loghandle->lgh_id.lgl_oi),
loghandle->lgh_id.lgl_ogen, *cur_offset);
return -EINVAL;
}
rec = buf;
if (LLOG_REC_HDR_NEEDS_SWABBING(rec))
lustre_swab_llog_rec(rec);
tail = (struct llog_rec_tail *)(buf + rc -
sizeof(struct llog_rec_tail));
/* get the last record in block */
last_rec = (struct llog_rec_hdr *)(buf + rc -
le32_to_cpu(tail->lrt_len));
if (LLOG_REC_HDR_NEEDS_SWABBING(last_rec))
lustre_swab_llog_rec(last_rec);
LASSERT(last_rec->lrh_index == tail->lrt_index);
*cur_idx = tail->lrt_index;
/* this shouldn't happen */
if (tail->lrt_index == 0) {
CERROR("Invalid llog tail at log id "DOSTID"/%u offset %llu\n",
POSTID(&loghandle->lgh_id.lgl_oi),
loghandle->lgh_id.lgl_ogen, *cur_offset);
return -EINVAL;
}
if (tail->lrt_index < next_idx)
continue;
/* sanity check that the start of the new buffer is no farther
* than the record that we wanted. This shouldn't happen. */
if (rec->lrh_index > next_idx) {
CERROR("missed desired record? %u > %u\n",
rec->lrh_index, next_idx);
return -ENOENT;
}
return 0;
}
return -EIO;
}
static int llog_lvfs_prev_block(const struct lu_env *env,
struct llog_handle *loghandle,
int prev_idx, void *buf, int len)
{
__u64 cur_offset;
int rc;
if (len == 0 || len & (LLOG_CHUNK_SIZE - 1))
return -EINVAL;
CDEBUG(D_OTHER, "looking for log index %u\n", prev_idx);
cur_offset = LLOG_CHUNK_SIZE;
llog_skip_over(&cur_offset, 0, prev_idx);
while (cur_offset < i_size_read(loghandle->lgh_file->f_dentry->d_inode)) {
struct llog_rec_hdr *rec, *last_rec;
struct llog_rec_tail *tail;
loff_t ppos = cur_offset;
rc = fsfilt_read_record(loghandle->lgh_ctxt->loc_exp->exp_obd,
loghandle->lgh_file, buf, len,
&cur_offset);
if (rc < 0) {
CERROR("Cant read llog block at log id "DOSTID
"/%u offset %llu\n",
POSTID(&loghandle->lgh_id.lgl_oi),
loghandle->lgh_id.lgl_ogen,
cur_offset);
return rc;
}
/* put number of bytes read into rc to make code simpler */
rc = cur_offset - ppos;
if (rc == 0) /* end of file, nothing to do */
return 0;
if (rc < sizeof(*tail)) {
CERROR("Invalid llog block at log id "DOSTID"/%u offset%llu\n",
POSTID(&loghandle->lgh_id.lgl_oi),
loghandle->lgh_id.lgl_ogen, cur_offset);
return -EINVAL;
}
rec = buf;
if (LLOG_REC_HDR_NEEDS_SWABBING(rec))
lustre_swab_llog_rec(rec);
tail = (struct llog_rec_tail *)(buf + rc -
sizeof(struct llog_rec_tail));
/* get the last record in block */
last_rec = (struct llog_rec_hdr *)(buf + rc -
le32_to_cpu(tail->lrt_len));
if (LLOG_REC_HDR_NEEDS_SWABBING(last_rec))
lustre_swab_llog_rec(last_rec);
LASSERT(last_rec->lrh_index == tail->lrt_index);
/* this shouldn't happen */
if (tail->lrt_index == 0) {
CERROR("Invalid llog tail at log id "DOSTID"/%u offset%llu\n",
POSTID(&loghandle->lgh_id.lgl_oi),
loghandle->lgh_id.lgl_ogen, cur_offset);
return -EINVAL;
}
if (tail->lrt_index < prev_idx)
continue;
/* sanity check that the start of the new buffer is no farther
* than the record that we wanted. This shouldn't happen. */
if (rec->lrh_index > prev_idx) {
CERROR("missed desired record? %u > %u\n",
rec->lrh_index, prev_idx);
return -ENOENT;
}
return 0;
}
return -EIO;
}
static struct file *llog_filp_open(char *dir, char *name, int flags, int mode)
{
char *logname;
struct file *filp;
int len;
OBD_ALLOC(logname, PATH_MAX);
if (logname == NULL)
return ERR_PTR(-ENOMEM);
len = snprintf(logname, PATH_MAX, "%s/%s", dir, name);
if (len >= PATH_MAX - 1) {
filp = ERR_PTR(-ENAMETOOLONG);
} else {
filp = filp_open(logname, flags, mode);
if (IS_ERR(filp) && PTR_ERR(filp) != -ENOENT)
CERROR("logfile creation %s: %ld\n", logname,
PTR_ERR(filp));
}
OBD_FREE(logname, PATH_MAX);
return filp;
}
static int llog_lvfs_open(const struct lu_env *env, struct llog_handle *handle,
struct llog_logid *logid, char *name,
enum llog_open_param open_param)
{
struct llog_ctxt *ctxt = handle->lgh_ctxt;
struct dentry *dchild = NULL;
struct obd_device *obd;
int rc = 0;
LASSERT(ctxt);
LASSERT(ctxt->loc_exp);
LASSERT(ctxt->loc_exp->exp_obd);
obd = ctxt->loc_exp->exp_obd;
LASSERT(handle);
if (logid != NULL) {
dchild = obd_lvfs_fid2dentry(ctxt->loc_exp, &logid->lgl_oi,
logid->lgl_ogen);
if (IS_ERR(dchild)) {
rc = PTR_ERR(dchild);
CERROR("%s: error looking up logfile #"DOSTID "#%08x:"
" rc = %d\n", ctxt->loc_obd->obd_name,
POSTID(&logid->lgl_oi), logid->lgl_ogen, rc);
GOTO(out, rc);
}
if (dchild->d_inode == NULL) {
l_dput(dchild);
rc = -ENOENT;
CERROR("%s: nonexistent llog #"DOSTID"#%08x:"
"rc = %d\n", ctxt->loc_obd->obd_name,
POSTID(&logid->lgl_oi), logid->lgl_ogen, rc);
GOTO(out, rc);
}
handle->lgh_file = l_dentry_open(&obd->obd_lvfs_ctxt, dchild,
O_RDWR | O_LARGEFILE);
l_dput(dchild);
if (IS_ERR(handle->lgh_file)) {
rc = PTR_ERR(handle->lgh_file);
handle->lgh_file = NULL;
CERROR("%s: error opening llog #"DOSTID"#%08x:"
"rc = %d\n", ctxt->loc_obd->obd_name,
POSTID(&logid->lgl_oi), logid->lgl_ogen, rc);
GOTO(out, rc);
}
handle->lgh_id = *logid;
} else if (name) {
handle->lgh_file = llog_filp_open(MOUNT_CONFIGS_DIR, name,
O_RDWR | O_LARGEFILE, 0644);
if (IS_ERR(handle->lgh_file)) {
rc = PTR_ERR(handle->lgh_file);
handle->lgh_file = NULL;
if (rc == -ENOENT && open_param == LLOG_OPEN_NEW) {
OBD_ALLOC(handle->lgh_name, strlen(name) + 1);
if (handle->lgh_name)
strcpy(handle->lgh_name, name);
else
GOTO(out, rc = -ENOMEM);
rc = 0;
} else {
GOTO(out, rc);
}
} else {
lustre_build_llog_lvfs_oid(&handle->lgh_id,
handle->lgh_file->f_dentry->d_inode->i_ino,
handle->lgh_file->f_dentry->d_inode->i_generation);
}
} else {
LASSERTF(open_param == LLOG_OPEN_NEW, "%#x\n", open_param);
handle->lgh_file = NULL;
}
/* No new llog is expected but doesn't exist */
if (open_param != LLOG_OPEN_NEW && handle->lgh_file == NULL)
GOTO(out_name, rc = -ENOENT);
return 0;
out_name:
if (handle->lgh_name != NULL)
OBD_FREE(handle->lgh_name, strlen(name) + 1);
out:
return rc;
}
static int llog_lvfs_exist(struct llog_handle *handle)
{
return (handle->lgh_file != NULL);
}
/* This is a callback from the llog_* functions.
* Assumes caller has already pushed us into the kernel context. */
static int llog_lvfs_create(const struct lu_env *env,
struct llog_handle *handle,
struct thandle *th)
{
struct llog_ctxt *ctxt = handle->lgh_ctxt;
struct obd_device *obd;
struct dentry *dchild = NULL;
struct file *file;
struct obdo *oa = NULL;
int rc = 0;
int open_flags = O_RDWR | O_CREAT | O_LARGEFILE;
LASSERT(ctxt);
LASSERT(ctxt->loc_exp);
obd = ctxt->loc_exp->exp_obd;
LASSERT(handle->lgh_file == NULL);
if (handle->lgh_name) {
file = llog_filp_open(MOUNT_CONFIGS_DIR, handle->lgh_name,
open_flags, 0644);
if (IS_ERR(file))
return PTR_ERR(file);
lustre_build_llog_lvfs_oid(&handle->lgh_id,
file->f_dentry->d_inode->i_ino,
file->f_dentry->d_inode->i_generation);
handle->lgh_file = file;
} else {
OBDO_ALLOC(oa);
if (oa == NULL)
return -ENOMEM;
ostid_set_seq_llog(&oa->o_oi);
oa->o_valid = OBD_MD_FLGENER | OBD_MD_FLGROUP;
rc = obd_create(NULL, ctxt->loc_exp, oa, NULL, NULL);
if (rc)
GOTO(out, rc);
/* FIXME: rationalize the misuse of o_generation in
* this API along with mds_obd_{create,destroy}.
* Hopefully it is only an internal API issue. */
#define o_generation o_parent_oid
dchild = obd_lvfs_fid2dentry(ctxt->loc_exp, &oa->o_oi,
oa->o_generation);
if (IS_ERR(dchild))
GOTO(out, rc = PTR_ERR(dchild));
file = l_dentry_open(&obd->obd_lvfs_ctxt, dchild, open_flags);
l_dput(dchild);
if (IS_ERR(file))
GOTO(out, rc = PTR_ERR(file));
handle->lgh_id.lgl_oi = oa->o_oi;
handle->lgh_id.lgl_ogen = oa->o_generation;
handle->lgh_file = file;
out:
OBDO_FREE(oa);
}
return rc;
}
static int llog_lvfs_close(const struct lu_env *env,
struct llog_handle *handle)
{
int rc;
if (handle->lgh_file == NULL)
return 0;
rc = filp_close(handle->lgh_file, 0);
if (rc)
CERROR("%s: error closing llog #"DOSTID"#%08x: "
"rc = %d\n", handle->lgh_ctxt->loc_obd->obd_name,
POSTID(&handle->lgh_id.lgl_oi),
handle->lgh_id.lgl_ogen, rc);
handle->lgh_file = NULL;
if (handle->lgh_name) {
OBD_FREE(handle->lgh_name, strlen(handle->lgh_name) + 1);
handle->lgh_name = NULL;
}
return rc;
}
static int llog_lvfs_destroy(const struct lu_env *env,
struct llog_handle *handle)
{
struct dentry *fdentry;
struct obdo *oa;
struct obd_device *obd = handle->lgh_ctxt->loc_exp->exp_obd;
char *dir;
void *th;
struct inode *inode;
int rc, rc1;
dir = MOUNT_CONFIGS_DIR;
LASSERT(handle->lgh_file);
fdentry = handle->lgh_file->f_dentry;
inode = fdentry->d_parent->d_inode;
if (strcmp(fdentry->d_parent->d_name.name, dir) == 0) {
struct lvfs_run_ctxt saved;
struct vfsmount *mnt = mntget(handle->lgh_file->f_vfsmnt);
push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
dget(fdentry);
rc = llog_lvfs_close(env, handle);
if (rc == 0) {
mutex_lock_nested(&inode->i_mutex, I_MUTEX_PARENT);
rc = ll_vfs_unlink(inode, fdentry, mnt);
mutex_unlock(&inode->i_mutex);
}
mntput(mnt);
dput(fdentry);
pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
return rc;
}
OBDO_ALLOC(oa);
if (oa == NULL)
return -ENOMEM;
oa->o_oi = handle->lgh_id.lgl_oi;
oa->o_generation = handle->lgh_id.lgl_ogen;
#undef o_generation
oa->o_valid = OBD_MD_FLID | OBD_MD_FLGROUP | OBD_MD_FLGENER;
rc = llog_lvfs_close(env, handle);
if (rc)
GOTO(out, rc);
th = fsfilt_start_log(obd, inode, FSFILT_OP_UNLINK, NULL, 1);
if (IS_ERR(th)) {
CERROR("fsfilt_start failed: %ld\n", PTR_ERR(th));
GOTO(out, rc = PTR_ERR(th));
}
rc = obd_destroy(NULL, handle->lgh_ctxt->loc_exp, oa,
NULL, NULL, NULL, NULL);
rc1 = fsfilt_commit(obd, inode, th, 0);
if (rc == 0 && rc1 != 0)
rc = rc1;
out:
OBDO_FREE(oa);
return rc;
}
static int llog_lvfs_declare_create(const struct lu_env *env,
struct llog_handle *res,
struct thandle *th)
{
return 0;
}
static int llog_lvfs_declare_write_rec(const struct lu_env *env,
struct llog_handle *loghandle,
struct llog_rec_hdr *rec,
int idx, struct thandle *th)
{
return 0;
}
struct llog_operations llog_lvfs_ops = {
.lop_write_rec = llog_lvfs_write_rec,
.lop_next_block = llog_lvfs_next_block,
.lop_prev_block = llog_lvfs_prev_block,
.lop_read_header = llog_lvfs_read_header,
.lop_create = llog_lvfs_create,
.lop_destroy = llog_lvfs_destroy,
.lop_close = llog_lvfs_close,
.lop_open = llog_lvfs_open,
.lop_exist = llog_lvfs_exist,
.lop_declare_create = llog_lvfs_declare_create,
.lop_declare_write_rec = llog_lvfs_declare_write_rec,
};
EXPORT_SYMBOL(llog_lvfs_ops);
#else /* !__KERNEL__ */
struct llog_operations llog_lvfs_ops = {};
#endif