hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

This pull request contains several UBIFS fixes. One of them fixes a race 

condition between the mmap page fault path and fsync. Another just removes a
 bogus assertion from the UBIFS memory shrinker.
 
 UBIFS also started honoring the MS_SILENT mount flag, so now it won't print
 many I/O errors when user-space just tries to probe for the FS.
 
 Rest of the changes are rather minor UBI/UBIFS fixes, improvements, and
 clean-ups.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJTlqqmAAoJECmIfjd9wqK0cYAP+QGoB8+DOGv4+rTtUegNaWaG
 QAeAkvOBxDa72NrTYMtDFBKiPPYcz0BUnPgsCyvYIlYknRuZ4xMsu1BucLF3y8E3
 P8aHpnNas0dA3el/M+M0qwpEG0pb1lQvFT1dJVP6/D4q4VexLlgt7PlQjP+98Dua
 jp9jBDMu3sEDsqA9NiO2hfuFuIqF6DFnBpglkNcGcAyOtzQ/Ps49nivhb1mFKuzI
 2kSm2kWmZCTnLlGG1uj9+diCpTKWZoES2Jmo6gcZjQIjlejSzQw4Fo8LqdmhfwOg
 0ba1D9kJuwPHmBeM0UW4fLtrJHkvs2F66YaRcbA7GUo5lNw6+yxTqi3jkGevsPOD
 7eQB8FVCco14PFKu8Vx4lbkS2ekZN6aQuYYw/EeY2f+w8MpQTfcWINP5OVNHHGVA
 QDeRiu9mRMbm3JARRe9NeL0+sryGN402jCHtESAhONUDsCmZKX9k8HUMY1iaPAIp
 kGJWOjbyzYRMJiOfQiklv4N6rusmnECiRWGCliKDCU6TER8U6m9ZCUHUKmtX+56c
 2yRtd6y6LVequ/p3wC3x66jF64wjh2PlTM5jrWSOIg42ihIGSMAbmB6MKA+4RxIv
 EejZ4lhCxUg6Xp7zd/qgdu3aJ/P2OM8yFL+BngGKFac54EnTDEUcc7d8c2DZZv8s
 7YYjpiKK1NQGnih0FABA
 =CP7Z
 -----END PGP SIGNATURE-----

Merge tag 'upstream-3.16-rc1-v2' of git://git.infradead.org/linux-ubifs

Pull UBIFS updates from Artem Bityutskiy:
 "This contains several UBIFS fixes.  One of them fixes a race condition
  between the mmap page fault path and fsync.  Another just removes a
  bogus assertion from the UBIFS memory shrinker.

  UBIFS also started honoring the MS_SILENT mount flag, so now it won't
  print many I/O errors when user-space just tries to probe for the FS.

  Rest of the changes are rather minor UBI/UBIFS fixes, improvements,
  and clean-ups"

* tag 'upstream-3.16-rc1-v2' of git://git.infradead.org/linux-ubifs:
  UBIFS: Add an assertion for clean_zn_cnt
  UBIFS: respect MS_SILENT mount flag
  UBIFS: Remove incorrect assertion in shrink_tnc()
  UBIFS: fix debugging check
  UBIFS: add missing ui pointer in debugging code
  UBI: block: Fix error path on alloc_workqueue failure
  UBIFS: Fix dump messages in ubifs_dump_lprops
  UBI: fix rb_tree node comparison in add_map
  UBIFS: Remove unused variables in ubifs_budget_space
  UBI: weaken the 'exclusive' constraint when opening volumes to rename
  UBIFS: fix an mmap and fsync race condition
This commit is contained in:
Linus Torvalds 2014-06-10 08:55:46 -07:00
parent a3c5493119 380347e9ca
commit d53b47c08d
11 changed files with 41 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/mtd/ubi/block.c
View File

@ -432,8 +432,10 @@ int ubiblock_create(struct ubi_volume_info *vi)
* Rembember workqueues are cheap, they're not threads.
*/
dev->wq = alloc_workqueue("%s", 0, 0, gd->disk_name);
if (!dev->wq)
if (!dev->wq) {
ret = -ENOMEM;
goto out_free_queue;
}
INIT_WORK(&dev->work, ubiblock_do_work);
mutex_lock(&devices_mutex);

2
drivers/mtd/ubi/cdev.c
View File

@ -731,7 +731,7 @@ static int rename_volumes(struct ubi_device *ubi,
goto out_free;
}
re->desc = ubi_open_volume(ubi->ubi_num, vol_id, UBI_EXCLUSIVE);
re->desc = ubi_open_volume(ubi->ubi_num, vol_id, UBI_READWRITE);
if (IS_ERR(re->desc)) {
err = PTR_ERR(re->desc);
ubi_err("cannot open volume %d, error %d", vol_id, err);

4
drivers/mtd/ubi/fastmap.c
View File

@ -125,9 +125,9 @@ static struct ubi_ainf_volume *add_vol(struct ubi_attach_info *ai, int vol_id,
parent = *p;
av = rb_entry(parent, struct ubi_ainf_volume, rb);
if (vol_id > av->vol_id)
if (vol_id < av->vol_id)
p = &(*p)->rb_left;
else if (vol_id > av->vol_id)
else
p = &(*p)->rb_right;
}

1
fs/ubifs/budget.c
View File

@ -437,7 +437,6 @@ static int calc_dd_growth(const struct ubifs_info *c,
*/
int ubifs_budget_space(struct ubifs_info *c, struct ubifs_budget_req *req)
{
int uninitialized_var(cmt_retries), uninitialized_var(wb_retries);
int err, idx_growth, data_growth, dd_growth, retried = 0;
ubifs_assert(req->new_page <= 1);

4
fs/ubifs/debug.c
View File

@ -745,8 +745,10 @@ void ubifs_dump_lprops(struct ubifs_info *c)
for (lnum = c->main_first; lnum < c->leb_cnt; lnum++) {
err = ubifs_read_one_lp(c, lnum, &lp);
if (err)
if (err) {
ubifs_err("cannot read lprops for LEB %d", lnum);
continue;
}
ubifs_dump_lprop(c, &lp);
}

6
fs/ubifs/file.c
View File

@ -903,8 +903,9 @@ static int do_writepage(struct page *page, int len)
struct ubifs_info *c = inode->i_sb->s_fs_info;
#ifdef UBIFS_DEBUG
struct ubifs_inode *ui = ubifs_inode(inode);
spin_lock(&ui->ui_lock);
ubifs_assert(page->index <= ui->synced_i_size << PAGE_CACHE_SIZE);
ubifs_assert(page->index <= ui->synced_i_size >> PAGE_CACHE_SHIFT);
spin_unlock(&ui->ui_lock);
#endif
@ -1525,8 +1526,7 @@ static int ubifs_vm_page_mkwrite(struct vm_area_struct *vma,
}
wait_for_stable_page(page);
unlock_page(page);
return 0;
return VM_FAULT_LOCKED;
out_unlock:
unlock_page(page);

18
fs/ubifs/io.c
View File

@ -988,30 +988,32 @@ int ubifs_read_node(const struct ubifs_info *c, void *buf, int type, int len,
return err;
if (type != ch->node_type) {
ubifs_err("bad node type (%d but expected %d)",
ch->node_type, type);
ubifs_errc(c, "bad node type (%d but expected %d)",
ch->node_type, type);
goto out;
}
err = ubifs_check_node(c, buf, lnum, offs, 0, 0);
if (err) {
ubifs_err("expected node type %d", type);
ubifs_errc(c, "expected node type %d", type);
return err;
}
l = le32_to_cpu(ch->len);
if (l != len) {
ubifs_err("bad node length %d, expected %d", l, len);
ubifs_errc(c, "bad node length %d, expected %d", l, len);
goto out;
}
return 0;
out:
ubifs_err("bad node at LEB %d:%d, LEB mapping status %d", lnum, offs,
ubi_is_mapped(c->ubi, lnum));
ubifs_dump_node(c, buf);
dump_stack();
ubifs_errc(c, "bad node at LEB %d:%d, LEB mapping status %d", lnum,
offs, ubi_is_mapped(c->ubi, lnum));
if (!c->probing) {
ubifs_dump_node(c, buf);
dump_stack();
}
return -EINVAL;
}

1
fs/ubifs/shrinker.c
View File

@ -128,7 +128,6 @@ static int shrink_tnc(struct ubifs_info *c, int nr, int age, int *contention)
freed = ubifs_destroy_tnc_subtree(znode);
atomic_long_sub(freed, &ubifs_clean_zn_cnt);
atomic_long_sub(freed, &c->clean_zn_cnt);
ubifs_assert(atomic_long_read(&c->clean_zn_cnt) >= 0);
total_freed += freed;
znode = zprev;
}

5
fs/ubifs/super.c
View File

@ -1149,6 +1149,9 @@ static int mount_ubifs(struct ubifs_info *c)
size_t sz;
c->ro_mount = !!(c->vfs_sb->s_flags & MS_RDONLY);
/* Suppress error messages while probing if MS_SILENT is set */
c->probing = !!(c->vfs_sb->s_flags & MS_SILENT);
err = init_constants_early(c);
if (err)
return err;
@ -1214,6 +1217,8 @@ static int mount_ubifs(struct ubifs_info *c)
if (err)
goto out_free;
c->probing = 0;
/*
* Make sure the compressor which is set as default in the superblock
* or overridden by mount options is actually compiled in.

5
fs/ubifs/tnc.c
View File

@ -2859,10 +2859,11 @@ void ubifs_tnc_close(struct ubifs_info *c)
{
tnc_destroy_cnext(c);
if (c->zroot.znode) {
long n;
long n, freed;
ubifs_destroy_tnc_subtree(c->zroot.znode);
n = atomic_long_read(&c->clean_zn_cnt);
freed = ubifs_destroy_tnc_subtree(c->zroot.znode);
ubifs_assert(freed == n);
atomic_long_sub(n, &ubifs_clean_zn_cnt);
}
kfree(c->gap_lebs);

11
fs/ubifs/ubifs.h
View File

@ -51,6 +51,15 @@
#define ubifs_warn(fmt, ...) \
pr_warn("UBIFS warning (pid %d): %s: " fmt "\n", \
current->pid, __func__, ##__VA_ARGS__)
/*
* A variant of 'ubifs_err()' which takes the UBIFS file-sytem description
* object as an argument.
*/
#define ubifs_errc(c, fmt, ...) \
do { \
if (!(c)->probing) \
ubifs_err(fmt, ##__VA_ARGS__); \
} while (0)
/* UBIFS file system VFS magic number */
#define UBIFS_SUPER_MAGIC 0x24051905
@ -1209,6 +1218,7 @@ struct ubifs_debug_info;
* @need_recovery: %1 if the file-system needs recovery
* @replaying: %1 during journal replay
* @mounting: %1 while mounting
* @probing: %1 while attempting to mount if MS_SILENT mount flag is set
* @remounting_rw: %1 while re-mounting from R/O mode to R/W mode
* @replay_list: temporary list used during journal replay
* @replay_buds: list of buds to replay
@ -1441,6 +1451,7 @@ struct ubifs_info {
unsigned int replaying:1;
unsigned int mounting:1;
unsigned int remounting_rw:1;
unsigned int probing:1;
struct list_head replay_list;
struct list_head replay_buds;
unsigned long long cs_sqnum;