UBIFS: refactor ubifs_rcvry_gc_commit
This commits refactors and cleans up 'ubifs_rcvry_gc_commit()' which was quite untidy, also removes the commentary which was not 100% correct. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
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parent
447442139c
commit
fe79c05f03
1 changed files with 18 additions and 37 deletions
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@ -1138,44 +1138,26 @@ int ubifs_rcvry_gc_commit(struct ubifs_info *c)
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{
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struct ubifs_wbuf *wbuf = &c->jheads[GCHD].wbuf;
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struct ubifs_lprops lp;
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int lnum, err;
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int err;
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c->gc_lnum = -1;
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if (wbuf->lnum == -1) {
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dbg_rcvry("no GC head LEB");
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return grab_empty_leb(c);
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}
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/*
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* See whether the used space in the dirtiest LEB fits in the GC head
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* LEB.
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*/
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if (wbuf->offs == c->leb_size) {
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dbg_rcvry("no room in GC head LEB");
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if (wbuf->lnum == -1 || wbuf->offs == c->leb_size) {
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dbg_rcvry("no GC head: wbuf->lnum %d, wbuf->offs %d",
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wbuf->lnum, wbuf->offs);
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return grab_empty_leb(c);
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}
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err = ubifs_find_dirty_leb(c, &lp, wbuf->offs, 2);
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if (err) {
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/*
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* There are no dirty or empty LEBs subject to here being
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* enough for the index. Try to use
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* 'ubifs_find_free_leb_for_idx()', which will return any empty
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* LEBs (ignoring index requirements). If the index then
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* doesn't have enough LEBs the recovery commit will fail -
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* which is the same result anyway i.e. recovery fails. So
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* there is no problem ignoring index requirements and just
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* grabbing a free LEB since we have already established there
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* is not a dirty LEB we could have used instead.
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*/
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if (err == -ENOSPC) {
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dbg_rcvry("could not find a dirty LEB");
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return grab_empty_leb(c);
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}
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return err;
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if (err != -ENOSPC)
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return err;
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dbg_rcvry("could not find a dirty LEB");
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return grab_empty_leb(c);
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}
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ubifs_assert(!(lp.flags & LPROPS_INDEX));
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ubifs_assert(lp.free + lp.dirty >= wbuf->offs);
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lnum = lp.lnum;
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/*
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* We run the commit before garbage collection otherwise subsequent
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@ -1185,11 +1167,8 @@ int ubifs_rcvry_gc_commit(struct ubifs_info *c)
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err = ubifs_run_commit(c);
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if (err)
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return err;
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/*
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* The data in the dirtiest LEB fits in the GC head LEB, so do the GC
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* - use locking to keep 'ubifs_assert()' happy.
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*/
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dbg_rcvry("GC'ing LEB %d", lnum);
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dbg_rcvry("GC'ing LEB %d", lp.lnum);
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mutex_lock_nested(&wbuf->io_mutex, wbuf->jhead);
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err = ubifs_garbage_collect_leb(c, &lp);
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if (err >= 0) {
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@ -1205,14 +1184,16 @@ int ubifs_rcvry_gc_commit(struct ubifs_info *c)
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err = -EINVAL;
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return err;
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}
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if (err != LEB_RETAINED) {
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dbg_err("GC returned %d", err);
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ubifs_assert(err == LEB_RETAINED);
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if (err != LEB_RETAINED)
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return -EINVAL;
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}
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err = ubifs_leb_unmap(c, c->gc_lnum);
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if (err)
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return err;
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dbg_rcvry("allocated LEB %d for GC", lnum);
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dbg_rcvry("allocated LEB %d for GC", lp.lnum);
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return 0;
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}
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