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UBIFS: share the next_log_lnum helper 

We'll need to use the 'next_log_lnum()' helper function from log.c in the fixup
code, so let's move it to misc.h. IOW, this is a preparation to the following
free space fixup changes.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This commit is contained in:
Artem Bityutskiy 2011-05-06 17:52:32 +03:00
parent 91c66083fc
commit e11602ea3e
2 changed files with 24 additions and 21 deletions
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28
fs/ubifs/log.c
View File

@ -99,20 +99,6 @@ struct ubifs_wbuf *ubifs_get_wbuf(struct ubifs_info *c, int lnum)
return NULL; return NULL;
} }
/**
* next_log_lnum - switch to the next log LEB.
* @c: UBIFS file-system description object
* @lnum: current log LEB
*/
static inline int next_log_lnum(const struct ubifs_info *c, int lnum)
{
lnum += 1;
if (lnum > c->log_last)
lnum = UBIFS_LOG_LNUM;
return lnum;
}
/** /**
* empty_log_bytes - calculate amount of empty space in the log. * empty_log_bytes - calculate amount of empty space in the log.
* @c: UBIFS file-system description object * @c: UBIFS file-system description object
@ -257,7 +243,7 @@ int ubifs_add_bud_to_log(struct ubifs_info *c, int jhead, int lnum, int offs)
ref->jhead = cpu_to_le32(jhead); ref->jhead = cpu_to_le32(jhead);
if (c->lhead_offs > c->leb_size - c->ref_node_alsz) { if (c->lhead_offs > c->leb_size - c->ref_node_alsz) {
c->lhead_lnum = next_log_lnum(c, c->lhead_lnum); c->lhead_lnum = ubifs_next_log_lnum(c, c->lhead_lnum);
c->lhead_offs = 0; c->lhead_offs = 0;
} }
@ -425,7 +411,7 @@ int ubifs_log_start_commit(struct ubifs_info *c, int *ltail_lnum)
/* Switch to the next log LEB */ /* Switch to the next log LEB */
if (c->lhead_offs) { if (c->lhead_offs) {
c->lhead_lnum = next_log_lnum(c, c->lhead_lnum); c->lhead_lnum = ubifs_next_log_lnum(c, c->lhead_lnum);
c->lhead_offs = 0; c->lhead_offs = 0;
} }
@ -446,7 +432,7 @@ int ubifs_log_start_commit(struct ubifs_info *c, int *ltail_lnum)
c->lhead_offs += len; c->lhead_offs += len;
if (c->lhead_offs == c->leb_size) { if (c->lhead_offs == c->leb_size) {
c->lhead_lnum = next_log_lnum(c, c->lhead_lnum); c->lhead_lnum = ubifs_next_log_lnum(c, c->lhead_lnum);
c->lhead_offs = 0; c->lhead_offs = 0;
} }
@ -533,7 +519,7 @@ int ubifs_log_post_commit(struct ubifs_info *c, int old_ltail_lnum)
} }
mutex_lock(&c->log_mutex); mutex_lock(&c->log_mutex);
for (lnum = old_ltail_lnum; lnum != c->ltail_lnum; for (lnum = old_ltail_lnum; lnum != c->ltail_lnum;
lnum = next_log_lnum(c, lnum)) { lnum = ubifs_next_log_lnum(c, lnum)) {
dbg_log("unmap log LEB %d", lnum); dbg_log("unmap log LEB %d", lnum);
err = ubifs_leb_unmap(c, lnum); err = ubifs_leb_unmap(c, lnum);
if (err) if (err)
@ -642,7 +628,7 @@ static int add_node(struct ubifs_info *c, void *buf, int *lnum, int *offs,
err = ubifs_leb_change(c, *lnum, buf, sz, UBI_SHORTTERM); err = ubifs_leb_change(c, *lnum, buf, sz, UBI_SHORTTERM);
if (err) if (err)
return err; return err;
*lnum = next_log_lnum(c, *lnum); *lnum = ubifs_next_log_lnum(c, *lnum);
*offs = 0; *offs = 0;
} }
memcpy(buf + *offs, node, len); memcpy(buf + *offs, node, len);
@ -712,7 +698,7 @@ int ubifs_consolidate_log(struct ubifs_info *c)
ubifs_scan_destroy(sleb); ubifs_scan_destroy(sleb);
if (lnum == c->lhead_lnum) if (lnum == c->lhead_lnum)
break; break;
lnum = next_log_lnum(c, lnum); lnum = ubifs_next_log_lnum(c, lnum);
} }
if (offs) { if (offs) {
int sz = ALIGN(offs, c->min_io_size); int sz = ALIGN(offs, c->min_io_size);
@ -732,7 +718,7 @@ int ubifs_consolidate_log(struct ubifs_info *c)
/* Unmap remaining LEBs */ /* Unmap remaining LEBs */
lnum = write_lnum; lnum = write_lnum;
do { do {
lnum = next_log_lnum(c, lnum); lnum = ubifs_next_log_lnum(c, lnum);
err = ubifs_leb_unmap(c, lnum); err = ubifs_leb_unmap(c, lnum);
if (err) if (err)
return err; return err;

17
fs/ubifs/misc.h
View File

@ -340,4 +340,21 @@ static inline void ubifs_release_lprops(struct ubifs_info *c)
mutex_unlock(&c->lp_mutex); mutex_unlock(&c->lp_mutex);
} }
/**
* ubifs_next_log_lnum - switch to the next log LEB.
* @c: UBIFS file-system description object
* @lnum: current log LEB
*
* This helper function returns the log LEB number which goes next after LEB
* 'lnum'.
*/
static inline int ubifs_next_log_lnum(const struct ubifs_info *c, int lnum)
{
lnum += 1;
if (lnum > c->log_last)
lnum = UBIFS_LOG_LNUM;
return lnum;
}
#endif /* __UBIFS_MISC_H__ */ #endif /* __UBIFS_MISC_H__ */