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authorLinus Torvalds <torvalds@linux-foundation.org>2014-09-27 17:05:14 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-09-27 17:05:14 -0700
commit1e3827bf8aebe29af2d6e49b89d85dfae4d0154f (patch)
tree7e61ad7bcac7ef4ea9ecd46640ec3729e383c819 /mm
parent6111da3432b10b2c56a21a5d8671aee46435326d (diff)
parentd2fa4a8476b911782f7e5167db18770222ac40c3 (diff)
downloadlinux-1e3827bf8aebe29af2d6e49b89d85dfae4d0154f.tar.gz
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs fixes from Al Viro: "Assorted fixes + unifying __d_move() and __d_materialise_dentry() + minimal regression fix for d_path() of victims of overwriting rename() ported on top of that" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: vfs: Don't exchange "short" filenames unconditionally. fold swapping ->d_name.hash into switch_names() fold unlocking the children into dentry_unlock_parents_for_move() kill __d_materialise_dentry() __d_materialise_dentry(): flip the order of arguments __d_move(): fold manipulations with ->d_child/->d_subdirs don't open-code d_rehash() in d_materialise_unique() pull rehashing and unlocking the target dentry into __d_materialise_dentry() ufs: deal with nfsd/iget races fuse: honour max_read and max_write in direct_io mode shmem: fix nlink for rename overwrite directory
Diffstat (limited to 'mm')
-rw-r--r--mm/iov_iter.c14
-rw-r--r--mm/shmem.c4
2 files changed, 12 insertions, 6 deletions
diff --git a/mm/iov_iter.c b/mm/iov_iter.c
index ab88dc0ea1d3..9a09f2034fcc 100644
--- a/mm/iov_iter.c
+++ b/mm/iov_iter.c
@@ -310,7 +310,7 @@ void iov_iter_init(struct iov_iter *i, int direction,
EXPORT_SYMBOL(iov_iter_init);
static ssize_t get_pages_iovec(struct iov_iter *i,
- struct page **pages, unsigned maxpages,
+ struct page **pages, size_t maxsize, unsigned maxpages,
size_t *start)
{
size_t offset = i->iov_offset;
@@ -323,6 +323,8 @@ static ssize_t get_pages_iovec(struct iov_iter *i,
len = iov->iov_len - offset;
if (len > i->count)
len = i->count;
+ if (len > maxsize)
+ len = maxsize;
addr = (unsigned long)iov->iov_base + offset;
len += *start = addr & (PAGE_SIZE - 1);
if (len > maxpages * PAGE_SIZE)
@@ -588,13 +590,15 @@ static unsigned long alignment_bvec(const struct iov_iter *i)
}
static ssize_t get_pages_bvec(struct iov_iter *i,
- struct page **pages, unsigned maxpages,
+ struct page **pages, size_t maxsize, unsigned maxpages,
size_t *start)
{
const struct bio_vec *bvec = i->bvec;
size_t len = bvec->bv_len - i->iov_offset;
if (len > i->count)
len = i->count;
+ if (len > maxsize)
+ len = maxsize;
/* can't be more than PAGE_SIZE */
*start = bvec->bv_offset + i->iov_offset;
@@ -711,13 +715,13 @@ unsigned long iov_iter_alignment(const struct iov_iter *i)
EXPORT_SYMBOL(iov_iter_alignment);
ssize_t iov_iter_get_pages(struct iov_iter *i,
- struct page **pages, unsigned maxpages,
+ struct page **pages, size_t maxsize, unsigned maxpages,
size_t *start)
{
if (i->type & ITER_BVEC)
- return get_pages_bvec(i, pages, maxpages, start);
+ return get_pages_bvec(i, pages, maxsize, maxpages, start);
else
- return get_pages_iovec(i, pages, maxpages, start);
+ return get_pages_iovec(i, pages, maxsize, maxpages, start);
}
EXPORT_SYMBOL(iov_iter_get_pages);
diff --git a/mm/shmem.c b/mm/shmem.c
index 0e5fb225007c..469f90d56051 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -2367,8 +2367,10 @@ static int shmem_rename2(struct inode *old_dir, struct dentry *old_dentry, struc
if (new_dentry->d_inode) {
(void) shmem_unlink(new_dir, new_dentry);
- if (they_are_dirs)
+ if (they_are_dirs) {
+ drop_nlink(new_dentry->d_inode);
drop_nlink(old_dir);
+ }
} else if (they_are_dirs) {
drop_nlink(old_dir);
inc_nlink(new_dir);