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gfs2: move check_journal_clean to util.c for future use

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Before this patch function check_journal_clean was in ops_fstype.c.
This patch moves it to util.c so we can make use of it elsewhere
in a future patch.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Reviewed-by: Andreas Gruenbacher <agruenba@redhat.com>
This commit is contained in:
Bob Peterson 2019-02-18 08:37:25 -07:00
parent 03678a99d1
commit 0d91061a37
3 changed files with 46 additions and 42 deletions
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42
fs/gfs2/ops_fstype.c
View File

@ -600,48 +600,6 @@ static int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh)
return error;
}
/**
* check_journal_clean - Make sure a journal is clean for a spectator mount
* @sdp: The GFS2 superblock
* @jd: The journal descriptor
*
* Returns: 0 if the journal is clean or locked, else an error
*/
static int check_journal_clean(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd)
{
int error;
struct gfs2_holder j_gh;
struct gfs2_log_header_host head;
struct gfs2_inode *ip;
ip = GFS2_I(jd->jd_inode);
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_NOEXP |
GL_EXACT | GL_NOCACHE, &j_gh);
if (error) {
fs_err(sdp, "Error locking journal for spectator mount.\n");
return -EPERM;
}
error = gfs2_jdesc_check(jd);
if (error) {
fs_err(sdp, "Error checking journal for spectator mount.\n");
goto out_unlock;
}
error = gfs2_find_jhead(jd, &head, false);
if (error) {
fs_err(sdp, "Error parsing journal for spectator mount.\n");
goto out_unlock;
}
if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) {
error = -EPERM;
fs_err(sdp, "jid=%u: Journal is dirty, so the first mounter "
"must not be a spectator.\n", jd->jd_jid);
}
out_unlock:
gfs2_glock_dq_uninit(&j_gh);
return error;
}
static int init_journal(struct gfs2_sbd *sdp, int undo)
{
struct inode *master = d_inode(sdp->sd_master_dir);

45
fs/gfs2/util.c
View File

@ -16,7 +16,10 @@
#include "gfs2.h"
#include "incore.h"
#include "glock.h"
#include "lops.h"
#include "recovery.h"
#include "rgrp.h"
#include "super.h"
#include "util.h"
struct kmem_cache *gfs2_glock_cachep __read_mostly;
@ -33,6 +36,48 @@ void gfs2_assert_i(struct gfs2_sbd *sdp)
fs_emerg(sdp, "fatal assertion failed\n");
}
/**
* check_journal_clean - Make sure a journal is clean for a spectator mount
* @sdp: The GFS2 superblock
* @jd: The journal descriptor
*
* Returns: 0 if the journal is clean or locked, else an error
*/
int check_journal_clean(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd)
{
int error;
struct gfs2_holder j_gh;
struct gfs2_log_header_host head;
struct gfs2_inode *ip;
ip = GFS2_I(jd->jd_inode);
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_NOEXP |
GL_EXACT | GL_NOCACHE, &j_gh);
if (error) {
fs_err(sdp, "Error locking journal for spectator mount.\n");
return -EPERM;
}
error = gfs2_jdesc_check(jd);
if (error) {
fs_err(sdp, "Error checking journal for spectator mount.\n");
goto out_unlock;
}
error = gfs2_find_jhead(jd, &head, false);
if (error) {
fs_err(sdp, "Error parsing journal for spectator mount.\n");
goto out_unlock;
}
if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) {
error = -EPERM;
fs_err(sdp, "jid=%u: Journal is dirty, so the first mounter "
"must not be a spectator.\n", jd->jd_jid);
}
out_unlock:
gfs2_glock_dq_uninit(&j_gh);
return error;
}
void gfs2_lm(struct gfs2_sbd *sdp, const char *fmt, ...)
{
struct va_format vaf;

1
fs/gfs2/util.h
View File

@ -136,6 +136,7 @@ static inline void gfs2_metatype_set(struct buffer_head *bh, u16 type,
int gfs2_io_error_i(struct gfs2_sbd *sdp, const char *function,
char *file, unsigned int line);
int check_journal_clean(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd);
#define gfs2_io_error(sdp) \
gfs2_io_error_i((sdp), __func__, __FILE__, __LINE__);