UBIFS: remove custom list of superblocks
This is a clean-up of the power-cut emulation code - remove the custom list of superblocks which we maintained to find the superblock by the UBI volume descriptor. We do not need that crud any longer, because now we can get the superblock as a function argument. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This commit is contained in:
Artem Bityutskiy
Artem Bityutskiy
Родитель
0a541b14e8
Коммит
f57cb188cc
105
fs/ubifs/debug.c
105
fs/ubifs/debug.c
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@ -2539,16 +2539,7 @@ error_dump:
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#define chance(n, d) (simple_rand() <= (n) * 32768LL / (d))
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struct failure_mode_info {
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struct list_head list;
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struct ubifs_info *c;
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};
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static LIST_HEAD(fmi_list);
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static DEFINE_SPINLOCK(fmi_lock);
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static unsigned int next;
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static int simple_rand(void)
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{
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if (next == 0)
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@ -2557,69 +2548,15 @@ static int simple_rand(void)
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return (next >> 16) & 32767;
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}
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static void failure_mode_init(struct ubifs_info *c)
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static int do_fail(struct ubifs_info *c, int lnum, int write)
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{
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struct failure_mode_info *fmi;
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struct ubifs_debug_info *d = c->dbg;
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fmi = kmalloc(sizeof(struct failure_mode_info), GFP_NOFS);
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if (!fmi) {
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ubifs_err("Failed to register failure mode - no memory");
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return;
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}
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fmi->c = c;
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spin_lock(&fmi_lock);
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list_add_tail(&fmi->list, &fmi_list);
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spin_unlock(&fmi_lock);
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}
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ubifs_assert(dbg_is_tst_rcvry(c));
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static void failure_mode_exit(struct ubifs_info *c)
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{
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struct failure_mode_info *fmi, *tmp;
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spin_lock(&fmi_lock);
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list_for_each_entry_safe(fmi, tmp, &fmi_list, list)
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if (fmi->c == c) {
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list_del(&fmi->list);
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kfree(fmi);
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}
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spin_unlock(&fmi_lock);
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}
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static struct ubifs_info *dbg_find_info(struct ubi_volume_desc *desc)
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{
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struct failure_mode_info *fmi;
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spin_lock(&fmi_lock);
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list_for_each_entry(fmi, &fmi_list, list)
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if (fmi->c->ubi == desc) {
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struct ubifs_info *c = fmi->c;
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spin_unlock(&fmi_lock);
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return c;
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}
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spin_unlock(&fmi_lock);
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return NULL;
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}
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static int in_failure_mode(struct ubi_volume_desc *desc)
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{
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struct ubifs_info *c = dbg_find_info(desc);
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if (c && dbg_is_tst_rcvry(c))
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return c->dbg->failure_mode;
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return 0;
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}
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static int do_fail(struct ubi_volume_desc *desc, int lnum, int write)
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{
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struct ubifs_info *c = dbg_find_info(desc);
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struct ubifs_debug_info *d;
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if (!c || !dbg_is_tst_rcvry(c))
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return 0;
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d = c->dbg;
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if (d->failure_mode)
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return 1;
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if (!d->fail_cnt) {
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/* First call - decide delay to failure */
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if (chance(1, 2)) {
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@ -2716,17 +2653,17 @@ static void cut_data(const void *buf, int len)
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p[i] = 0xff;
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}
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int dbg_leb_write(struct ubi_volume_desc *desc, int lnum, const void *buf,
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int dbg_leb_write(struct ubifs_info *c, int lnum, const void *buf,
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int offs, int len, int dtype)
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{
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int err, failing;
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if (in_failure_mode(desc))
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if (c->dbg->failure_mode)
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return -EROFS;
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failing = do_fail(desc, lnum, 1);
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failing = do_fail(c, lnum, 1);
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if (failing)
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cut_data(buf, len);
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err = ubi_leb_write(desc, lnum, buf, offs, len, dtype);
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err = ubi_leb_write(c->ubi, lnum, buf, offs, len, dtype);
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if (err)
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return err;
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if (failing)
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@ -2734,45 +2671,45 @@ int dbg_leb_write(struct ubi_volume_desc *desc, int lnum, const void *buf,
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return 0;
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}
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int dbg_leb_change(struct ubi_volume_desc *desc, int lnum, const void *buf,
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int dbg_leb_change(struct ubifs_info *c, int lnum, const void *buf,
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int len, int dtype)
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{
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int err;
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if (do_fail(desc, lnum, 1))
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if (do_fail(c, lnum, 1))
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return -EROFS;
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err = ubi_leb_change(desc, lnum, buf, len, dtype);
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err = ubi_leb_change(c->ubi, lnum, buf, len, dtype);
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if (err)
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return err;
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if (do_fail(desc, lnum, 1))
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if (do_fail(c, lnum, 1))
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return -EROFS;
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return 0;
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}
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int dbg_leb_unmap(struct ubi_volume_desc *desc, int lnum)
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int dbg_leb_unmap(struct ubifs_info *c, int lnum)
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{
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int err;
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if (do_fail(desc, lnum, 0))
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if (do_fail(c, lnum, 0))
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return -EROFS;
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err = ubi_leb_unmap(desc, lnum);
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err = ubi_leb_unmap(c->ubi, lnum);
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if (err)
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return err;
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if (do_fail(desc, lnum, 0))
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if (do_fail(c, lnum, 0))
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return -EROFS;
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return 0;
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}
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int dbg_leb_map(struct ubi_volume_desc *desc, int lnum, int dtype)
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int dbg_leb_map(struct ubifs_info *c, int lnum, int dtype)
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{
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int err;
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if (do_fail(desc, lnum, 0))
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if (do_fail(c, lnum, 0))
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return -EROFS;
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err = ubi_leb_map(desc, lnum, dtype);
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err = ubi_leb_map(c->ubi, lnum, dtype);
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if (err)
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return err;
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if (do_fail(desc, lnum, 0))
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if (do_fail(c, lnum, 0))
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return -EROFS;
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return 0;
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}
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@ -3210,7 +3147,6 @@ int ubifs_debugging_init(struct ubifs_info *c)
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if (!c->dbg)
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return -ENOMEM;
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failure_mode_init(c);
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return 0;
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}
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@ -3220,7 +3156,6 @@ int ubifs_debugging_init(struct ubifs_info *c)
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*/
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void ubifs_debugging_exit(struct ubifs_info *c)
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{
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failure_mode_exit(c);
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kfree(c->dbg);
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}
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@ -305,12 +305,12 @@ int dbg_check_inode_size(struct ubifs_info *c, const struct inode *inode,
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int dbg_check_data_nodes_order(struct ubifs_info *c, struct list_head *head);
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int dbg_check_nondata_nodes_order(struct ubifs_info *c, struct list_head *head);
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int dbg_leb_write(struct ubi_volume_desc *desc, int lnum, const void *buf,
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int offs, int len, int dtype);
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int dbg_leb_change(struct ubi_volume_desc *desc, int lnum, const void *buf,
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int dbg_leb_write(struct ubifs_info *c, int lnum, const void *buf, int offs,
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int len, int dtype);
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int dbg_leb_unmap(struct ubi_volume_desc *desc, int lnum);
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int dbg_leb_map(struct ubi_volume_desc *desc, int lnum, int dtype);
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int dbg_leb_change(struct ubifs_info *c, int lnum, const void *buf, int len,
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int dtype);
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int dbg_leb_unmap(struct ubifs_info *c, int lnum);
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int dbg_leb_map(struct ubifs_info *c, int lnum, int dtype);
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/* Debugfs-related stuff */
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int dbg_debugfs_init(void);
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@ -442,16 +442,15 @@ static inline int
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dbg_check_nondata_nodes_order(struct ubifs_info *c,
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struct list_head *head) { return 0; }
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static inline int dbg_leb_write(struct ubi_volume_desc *desc,
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int lnum, const void *buf,
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int offset, int len, int dtype) { return 0; }
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static inline int dbg_leb_change(struct ubi_volume_desc *desc,
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int lnum, const void *buf,
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static inline int dbg_leb_write(struct ubifs_info *c, int lnum,
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const void *buf, int offset,
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int len, int dtype) { return 0; }
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static inline int dbg_leb_unmap(struct ubi_volume_desc *desc,
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int lnum) { return 0; }
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static inline int dbg_leb_map(struct ubi_volume_desc *desc,
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int lnum, int dtype) { return 0; }
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static inline int dbg_leb_change(struct ubifs_info *c, int lnum,
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const void *buf, int len,
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int dtype) { return 0; }
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static inline int dbg_leb_unmap(struct ubifs_info *c, int lnum) { return 0; }
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static inline int dbg_leb_map(struct ubifs_info *c, int lnum,
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int dtype) { return 0; }
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static inline int dbg_is_chk_gen(const struct ubifs_info *c) { return 0; }
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static inline int dbg_is_chk_index(const struct ubifs_info *c) { return 0; }
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@ -125,7 +125,7 @@ int ubifs_leb_write(struct ubifs_info *c, int lnum, const void *buf, int offs,
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if (!dbg_is_tst_rcvry(c))
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err = ubi_leb_write(c->ubi, lnum, buf, offs, len, dtype);
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else
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err = dbg_leb_write(c->ubi, lnum, buf, offs, len, dtype);
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err = dbg_leb_write(c, lnum, buf, offs, len, dtype);
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if (err) {
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ubifs_err("writing %d bytes to LEB %d:%d failed, error %d",
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len, lnum, offs, err);
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@ -146,7 +146,7 @@ int ubifs_leb_change(struct ubifs_info *c, int lnum, const void *buf, int len,
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if (!dbg_is_tst_rcvry(c))
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err = ubi_leb_change(c->ubi, lnum, buf, len, dtype);
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else
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err = dbg_leb_change(c->ubi, lnum, buf, len, dtype);
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err = dbg_leb_change(c, lnum, buf, len, dtype);
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if (err) {
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ubifs_err("changing %d bytes in LEB %d failed, error %d",
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len, lnum, err);
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@ -166,7 +166,7 @@ int ubifs_leb_unmap(struct ubifs_info *c, int lnum)
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if (!dbg_is_tst_rcvry(c))
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err = ubi_leb_unmap(c->ubi, lnum);
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else
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err = dbg_leb_unmap(c->ubi, lnum);
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err = dbg_leb_unmap(c, lnum);
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if (err) {
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ubifs_err("unmap LEB %d failed, error %d", lnum, err);
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ubifs_ro_mode(c, err);
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@ -185,7 +185,7 @@ int ubifs_leb_map(struct ubifs_info *c, int lnum, int dtype)
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if (!dbg_is_tst_rcvry(c))
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err = ubi_leb_map(c->ubi, lnum, dtype);
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else
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err = dbg_leb_map(c->ubi, lnum, dtype);
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err = dbg_leb_map(c, lnum, dtype);
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if (err) {
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ubifs_err("mapping LEB %d failed, error %d", lnum, err);
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ubifs_ro_mode(c, err);
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