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-rw-r--r--fs/block_dev.c166
-rw-r--r--fs/buffer.c145
-rw-r--r--fs/cifs/file.c6
-rw-r--r--fs/cifs/readdir.c5
-rw-r--r--fs/cifs/smb1ops.c3
-rw-r--r--fs/direct-io.c8
-rw-r--r--fs/file.c14
-rw-r--r--fs/fs-writeback.c2
-rw-r--r--fs/inode.c16
-rw-r--r--fs/internal.h1
-rw-r--r--fs/jbd/transaction.c2
-rw-r--r--fs/namei.c5
-rw-r--r--fs/nfs/dir.c7
-rw-r--r--fs/proc/base.c5
14 files changed, 181 insertions, 204 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 1a1e5e3b1eaf..ab3a456f6650 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -70,19 +70,6 @@ static void bdev_inode_switch_bdi(struct inode *inode,
spin_unlock(&dst->wb.list_lock);
}
-sector_t blkdev_max_block(struct block_device *bdev)
-{
- sector_t retval = ~((sector_t)0);
- loff_t sz = i_size_read(bdev->bd_inode);
-
- if (sz) {
- unsigned int size = block_size(bdev);
- unsigned int sizebits = blksize_bits(size);
- retval = (sz >> sizebits);
- }
- return retval;
-}
-
/* Kill _all_ buffers and pagecache , dirty or not.. */
void kill_bdev(struct block_device *bdev)
{
@@ -116,8 +103,6 @@ EXPORT_SYMBOL(invalidate_bdev);
int set_blocksize(struct block_device *bdev, int size)
{
- struct address_space *mapping;
-
/* Size must be a power of two, and between 512 and PAGE_SIZE */
if (size > PAGE_SIZE || size < 512 || !is_power_of_2(size))
return -EINVAL;
@@ -126,19 +111,6 @@ int set_blocksize(struct block_device *bdev, int size)
if (size < bdev_logical_block_size(bdev))
return -EINVAL;
- /* Prevent starting I/O or mapping the device */
- percpu_down_write(&bdev->bd_block_size_semaphore);
-
- /* Check that the block device is not memory mapped */
- mapping = bdev->bd_inode->i_mapping;
- mutex_lock(&mapping->i_mmap_mutex);
- if (mapping_mapped(mapping)) {
- mutex_unlock(&mapping->i_mmap_mutex);
- percpu_up_write(&bdev->bd_block_size_semaphore);
- return -EBUSY;
- }
- mutex_unlock(&mapping->i_mmap_mutex);
-
/* Don't change the size if it is same as current */
if (bdev->bd_block_size != size) {
sync_blockdev(bdev);
@@ -146,9 +118,6 @@ int set_blocksize(struct block_device *bdev, int size)
bdev->bd_inode->i_blkbits = blksize_bits(size);
kill_bdev(bdev);
}
-
- percpu_up_write(&bdev->bd_block_size_semaphore);
-
return 0;
}
@@ -181,52 +150,12 @@ static int
blkdev_get_block(struct inode *inode, sector_t iblock,
struct buffer_head *bh, int create)
{
- if (iblock >= blkdev_max_block(I_BDEV(inode))) {
- if (create)
- return -EIO;
-
- /*
- * for reads, we're just trying to fill a partial page.
- * return a hole, they will have to call get_block again
- * before they can fill it, and they will get -EIO at that
- * time
- */
- return 0;
- }
bh->b_bdev = I_BDEV(inode);
bh->b_blocknr = iblock;
set_buffer_mapped(bh);
return 0;
}
-static int
-blkdev_get_blocks(struct inode *inode, sector_t iblock,
- struct buffer_head *bh, int create)
-{
- sector_t end_block = blkdev_max_block(I_BDEV(inode));
- unsigned long max_blocks = bh->b_size >> inode->i_blkbits;
-
- if ((iblock + max_blocks) > end_block) {
- max_blocks = end_block - iblock;
- if ((long)max_blocks <= 0) {
- if (create)
- return -EIO; /* write fully beyond EOF */
- /*
- * It is a read which is fully beyond EOF. We return
- * a !buffer_mapped buffer
- */
- max_blocks = 0;
- }
- }
-
- bh->b_bdev = I_BDEV(inode);
- bh->b_blocknr = iblock;
- bh->b_size = max_blocks << inode->i_blkbits;
- if (max_blocks)
- set_buffer_mapped(bh);
- return 0;
-}
-
static ssize_t
blkdev_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
loff_t offset, unsigned long nr_segs)
@@ -235,7 +164,7 @@ blkdev_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov,
struct inode *inode = file->f_mapping->host;
return __blockdev_direct_IO(rw, iocb, inode, I_BDEV(inode), iov, offset,
- nr_segs, blkdev_get_blocks, NULL, NULL, 0);
+ nr_segs, blkdev_get_block, NULL, NULL, 0);
}
int __sync_blockdev(struct block_device *bdev, int wait)
@@ -459,12 +388,6 @@ static struct inode *bdev_alloc_inode(struct super_block *sb)
struct bdev_inode *ei = kmem_cache_alloc(bdev_cachep, GFP_KERNEL);
if (!ei)
return NULL;
-
- if (unlikely(percpu_init_rwsem(&ei->bdev.bd_block_size_semaphore))) {
- kmem_cache_free(bdev_cachep, ei);
- return NULL;
- }
-
return &ei->vfs_inode;
}
@@ -473,8 +396,6 @@ static void bdev_i_callback(struct rcu_head *head)
struct inode *inode = container_of(head, struct inode, i_rcu);
struct bdev_inode *bdi = BDEV_I(inode);
- percpu_free_rwsem(&bdi->bdev.bd_block_size_semaphore);
-
kmem_cache_free(bdev_cachep, bdi);
}
@@ -1593,22 +1514,6 @@ static long block_ioctl(struct file *file, unsigned cmd, unsigned long arg)
return blkdev_ioctl(bdev, mode, cmd, arg);
}
-ssize_t blkdev_aio_read(struct kiocb *iocb, const struct iovec *iov,
- unsigned long nr_segs, loff_t pos)
-{
- ssize_t ret;
- struct block_device *bdev = I_BDEV(iocb->ki_filp->f_mapping->host);
-
- percpu_down_read(&bdev->bd_block_size_semaphore);
-
- ret = generic_file_aio_read(iocb, iov, nr_segs, pos);
-
- percpu_up_read(&bdev->bd_block_size_semaphore);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(blkdev_aio_read);
-
/*
* Write data to the block device. Only intended for the block device itself
* and the raw driver which basically is a fake block device.
@@ -1620,16 +1525,12 @@ ssize_t blkdev_aio_write(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, loff_t pos)
{
struct file *file = iocb->ki_filp;
- struct block_device *bdev = I_BDEV(file->f_mapping->host);
struct blk_plug plug;
ssize_t ret;
BUG_ON(iocb->ki_pos != pos);
blk_start_plug(&plug);
-
- percpu_down_read(&bdev->bd_block_size_semaphore);
-
ret = __generic_file_aio_write(iocb, iov, nr_segs, &iocb->ki_pos);
if (ret > 0 || ret == -EIOCBQUEUED) {
ssize_t err;
@@ -1638,62 +1539,27 @@ ssize_t blkdev_aio_write(struct kiocb *iocb, const struct iovec *iov,
if (err < 0 && ret > 0)
ret = err;
}
-
- percpu_up_read(&bdev->bd_block_size_semaphore);
-
blk_finish_plug(&plug);
-
return ret;
}
EXPORT_SYMBOL_GPL(blkdev_aio_write);
-static int blkdev_mmap(struct file *file, struct vm_area_struct *vma)
-{
- int ret;
- struct block_device *bdev = I_BDEV(file->f_mapping->host);
-
- percpu_down_read(&bdev->bd_block_size_semaphore);
-
- ret = generic_file_mmap(file, vma);
-
- percpu_up_read(&bdev->bd_block_size_semaphore);
-
- return ret;
-}
-
-static ssize_t blkdev_splice_read(struct file *file, loff_t *ppos,
- struct pipe_inode_info *pipe, size_t len,
- unsigned int flags)
-{
- ssize_t ret;
- struct block_device *bdev = I_BDEV(file->f_mapping->host);
-
- percpu_down_read(&bdev->bd_block_size_semaphore);
-
- ret = generic_file_splice_read(file, ppos, pipe, len, flags);
-
- percpu_up_read(&bdev->bd_block_size_semaphore);
-
- return ret;
-}
-
-static ssize_t blkdev_splice_write(struct pipe_inode_info *pipe,
- struct file *file, loff_t *ppos, size_t len,
- unsigned int flags)
+static ssize_t blkdev_aio_read(struct kiocb *iocb, const struct iovec *iov,
+ unsigned long nr_segs, loff_t pos)
{
- ssize_t ret;
- struct block_device *bdev = I_BDEV(file->f_mapping->host);
-
- percpu_down_read(&bdev->bd_block_size_semaphore);
-
- ret = generic_file_splice_write(pipe, file, ppos, len, flags);
+ struct file *file = iocb->ki_filp;
+ struct inode *bd_inode = file->f_mapping->host;
+ loff_t size = i_size_read(bd_inode);
- percpu_up_read(&bdev->bd_block_size_semaphore);
+ if (pos >= size)
+ return 0;
- return ret;
+ size -= pos;
+ if (size < INT_MAX)
+ nr_segs = iov_shorten((struct iovec *)iov, nr_segs, size);
+ return generic_file_aio_read(iocb, iov, nr_segs, pos);
}
-
/*
* Try to release a page associated with block device when the system
* is under memory pressure.
@@ -1724,16 +1590,16 @@ const struct file_operations def_blk_fops = {
.llseek = block_llseek,
.read = do_sync_read,
.write = do_sync_write,
- .aio_read = blkdev_aio_read,
+ .aio_read = blkdev_aio_read,
.aio_write = blkdev_aio_write,
- .mmap = blkdev_mmap,
+ .mmap = generic_file_mmap,
.fsync = blkdev_fsync,
.unlocked_ioctl = block_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = compat_blkdev_ioctl,
#endif
- .splice_read = blkdev_splice_read,
- .splice_write = blkdev_splice_write,
+ .splice_read = generic_file_splice_read,
+ .splice_write = generic_file_splice_write,
};
int ioctl_by_bdev(struct block_device *bdev, unsigned cmd, unsigned long arg)
diff --git a/fs/buffer.c b/fs/buffer.c
index b5f044283edb..ec0aca8ba6bf 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -911,6 +911,18 @@ link_dev_buffers(struct page *page, struct buffer_head *head)
attach_page_buffers(page, head);
}
+static sector_t blkdev_max_block(struct block_device *bdev, unsigned int size)
+{
+ sector_t retval = ~((sector_t)0);
+ loff_t sz = i_size_read(bdev->bd_inode);
+
+ if (sz) {
+ unsigned int sizebits = blksize_bits(size);
+ retval = (sz >> sizebits);
+ }
+ return retval;
+}
+
/*
* Initialise the state of a blockdev page's buffers.
*/
@@ -921,7 +933,7 @@ init_page_buffers(struct page *page, struct block_device *bdev,
struct buffer_head *head = page_buffers(page);
struct buffer_head *bh = head;
int uptodate = PageUptodate(page);
- sector_t end_block = blkdev_max_block(I_BDEV(bdev->bd_inode));
+ sector_t end_block = blkdev_max_block(I_BDEV(bdev->bd_inode), size);
do {
if (!buffer_mapped(bh)) {
@@ -1553,6 +1565,28 @@ void unmap_underlying_metadata(struct block_device *bdev, sector_t block)
EXPORT_SYMBOL(unmap_underlying_metadata);
/*
+ * Size is a power-of-two in the range 512..PAGE_SIZE,
+ * and the case we care about most is PAGE_SIZE.
+ *
+ * So this *could* possibly be written with those
+ * constraints in mind (relevant mostly if some
+ * architecture has a slow bit-scan instruction)
+ */
+static inline int block_size_bits(unsigned int blocksize)
+{
+ return ilog2(blocksize);
+}
+
+static struct buffer_head *create_page_buffers(struct page *page, struct inode *inode, unsigned int b_state)
+{
+ BUG_ON(!PageLocked(page));
+
+ if (!page_has_buffers(page))
+ create_empty_buffers(page, 1 << ACCESS_ONCE(inode->i_blkbits), b_state);
+ return page_buffers(page);
+}
+
+/*
* NOTE! All mapped/uptodate combinations are valid:
*
* Mapped Uptodate Meaning
@@ -1589,19 +1623,13 @@ static int __block_write_full_page(struct inode *inode, struct page *page,
sector_t block;
sector_t last_block;
struct buffer_head *bh, *head;
- const unsigned blocksize = 1 << inode->i_blkbits;
+ unsigned int blocksize, bbits;
int nr_underway = 0;
int write_op = (wbc->sync_mode == WB_SYNC_ALL ?
WRITE_SYNC : WRITE);
- BUG_ON(!PageLocked(page));
-
- last_block = (i_size_read(inode) - 1) >> inode->i_blkbits;
-
- if (!page_has_buffers(page)) {
- create_empty_buffers(page, blocksize,
+ head = create_page_buffers(page, inode,
(1 << BH_Dirty)|(1 << BH_Uptodate));
- }
/*
* Be very careful. We have no exclusion from __set_page_dirty_buffers
@@ -1613,9 +1641,12 @@ static int __block_write_full_page(struct inode *inode, struct page *page,
* handle that here by just cleaning them.
*/
- block = (sector_t)page->index << (PAGE_CACHE_SHIFT - inode->i_blkbits);
- head = page_buffers(page);
bh = head;
+ blocksize = bh->b_size;
+ bbits = block_size_bits(blocksize);
+
+ block = (sector_t)page->index << (PAGE_CACHE_SHIFT - bbits);
+ last_block = (i_size_read(inode) - 1) >> bbits;
/*
* Get all the dirty buffers mapped to disk addresses and
@@ -1806,12 +1837,10 @@ int __block_write_begin(struct page *page, loff_t pos, unsigned len,
BUG_ON(to > PAGE_CACHE_SIZE);
BUG_ON(from > to);
- blocksize = 1 << inode->i_blkbits;
- if (!page_has_buffers(page))
- create_empty_buffers(page, blocksize, 0);
- head = page_buffers(page);
+ head = create_page_buffers(page, inode, 0);
+ blocksize = head->b_size;
+ bbits = block_size_bits(blocksize);
- bbits = inode->i_blkbits;
block = (sector_t)page->index << (PAGE_CACHE_SHIFT - bbits);
for(bh = head, block_start = 0; bh != head || !block_start;
@@ -1881,11 +1910,11 @@ static int __block_commit_write(struct inode *inode, struct page *page,
unsigned blocksize;
struct buffer_head *bh, *head;
- blocksize = 1 << inode->i_blkbits;
+ bh = head = page_buffers(page);
+ blocksize = bh->b_size;
- for(bh = head = page_buffers(page), block_start = 0;
- bh != head || !block_start;
- block_start=block_end, bh = bh->b_this_page) {
+ block_start = 0;
+ do {
block_end = block_start + blocksize;
if (block_end <= from || block_start >= to) {
if (!buffer_uptodate(bh))
@@ -1895,7 +1924,10 @@ static int __block_commit_write(struct inode *inode, struct page *page,
mark_buffer_dirty(bh);
}
clear_buffer_new(bh);
- }
+
+ block_start = block_end;
+ bh = bh->b_this_page;
+ } while (bh != head);
/*
* If this is a partial write which happened to make all buffers
@@ -2020,7 +2052,6 @@ EXPORT_SYMBOL(generic_write_end);
int block_is_partially_uptodate(struct page *page, read_descriptor_t *desc,
unsigned long from)
{
- struct inode *inode = page->mapping->host;
unsigned block_start, block_end, blocksize;
unsigned to;
struct buffer_head *bh, *head;
@@ -2029,13 +2060,13 @@ int block_is_partially_uptodate(struct page *page, read_descriptor_t *desc,
if (!page_has_buffers(page))
return 0;
- blocksize = 1 << inode->i_blkbits;
+ head = page_buffers(page);
+ blocksize = head->b_size;
to = min_t(unsigned, PAGE_CACHE_SIZE - from, desc->count);
to = from + to;
if (from < blocksize && to > PAGE_CACHE_SIZE - blocksize)
return 0;
- head = page_buffers(page);
bh = head;
block_start = 0;
do {
@@ -2068,18 +2099,16 @@ int block_read_full_page(struct page *page, get_block_t *get_block)
struct inode *inode = page->mapping->host;
sector_t iblock, lblock;
struct buffer_head *bh, *head, *arr[MAX_BUF_PER_PAGE];
- unsigned int blocksize;
+ unsigned int blocksize, bbits;
int nr, i;
int fully_mapped = 1;
- BUG_ON(!PageLocked(page));
- blocksize = 1 << inode->i_blkbits;
- if (!page_has_buffers(page))
- create_empty_buffers(page, blocksize, 0);
- head = page_buffers(page);
+ head = create_page_buffers(page, inode, 0);
+ blocksize = head->b_size;
+ bbits = block_size_bits(blocksize);
- iblock = (sector_t)page->index << (PAGE_CACHE_SHIFT - inode->i_blkbits);
- lblock = (i_size_read(inode)+blocksize-1) >> inode->i_blkbits;
+ iblock = (sector_t)page->index << (PAGE_CACHE_SHIFT - bbits);
+ lblock = (i_size_read(inode)+blocksize-1) >> bbits;
bh = head;
nr = 0;
i = 0;
@@ -2864,6 +2893,55 @@ static void end_bio_bh_io_sync(struct bio *bio, int err)
bio_put(bio);
}
+/*
+ * This allows us to do IO even on the odd last sectors
+ * of a device, even if the bh block size is some multiple
+ * of the physical sector size.
+ *
+ * We'll just truncate the bio to the size of the device,
+ * and clear the end of the buffer head manually.
+ *
+ * Truly out-of-range accesses will turn into actual IO
+ * errors, this only handles the "we need to be able to
+ * do IO at the final sector" case.
+ */
+static void guard_bh_eod(int rw, struct bio *bio, struct buffer_head *bh)
+{
+ sector_t maxsector;
+ unsigned bytes;
+
+ maxsector = i_size_read(bio->bi_bdev->bd_inode) >> 9;
+ if (!maxsector)
+ return;
+
+ /*
+ * If the *whole* IO is past the end of the device,
+ * let it through, and the IO layer will turn it into
+ * an EIO.
+ */
+ if (unlikely(bio->bi_sector >= maxsector))
+ return;
+
+ maxsector -= bio->bi_sector;
+ bytes = bio->bi_size;
+ if (likely((bytes >> 9) <= maxsector))
+ return;
+
+ /* Uhhuh. We've got a bh that straddles the device size! */
+ bytes = maxsector << 9;
+
+ /* Truncate the bio.. */
+ bio->bi_size = bytes;
+ bio->bi_io_vec[0].bv_len = bytes;
+
+ /* ..and clear the end of the buffer for reads */
+ if ((rw & RW_MASK) == READ) {
+ void *kaddr = kmap_atomic(bh->b_page);
+ memset(kaddr + bh_offset(bh) + bytes, 0, bh->b_size - bytes);
+ kunmap_atomic(kaddr);
+ }
+}
+
int submit_bh(int rw, struct buffer_head * bh)
{
struct bio *bio;
@@ -2900,6 +2978,9 @@ int submit_bh(int rw, struct buffer_head * bh)
bio->bi_end_io = end_bio_bh_io_sync;
bio->bi_private = bh;
+ /* Take care of bh's that straddle the end of the device */
+ guard_bh_eod(rw, bio, bh);
+
bio_get(bio);
submit_bio(rw, bio);
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index edb25b4bbb95..70b6f4c3a0c1 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1794,7 +1794,6 @@ static int cifs_writepages(struct address_space *mapping,
struct TCP_Server_Info *server;
struct page *page;
int rc = 0;
- loff_t isize = i_size_read(mapping->host);
/*
* If wsize is smaller than the page cache size, default to writing
@@ -1899,7 +1898,7 @@ retry:
*/
set_page_writeback(page);
- if (page_offset(page) >= isize) {
+ if (page_offset(page) >= i_size_read(mapping->host)) {
done = true;
unlock_page(page);
end_page_writeback(page);
@@ -1932,7 +1931,8 @@ retry:
wdata->offset = page_offset(wdata->pages[0]);
wdata->pagesz = PAGE_CACHE_SIZE;
wdata->tailsz =
- min(isize - page_offset(wdata->pages[nr_pages - 1]),
+ min(i_size_read(mapping->host) -
+ page_offset(wdata->pages[nr_pages - 1]),
(loff_t)PAGE_CACHE_SIZE);
wdata->bytes = ((nr_pages - 1) * PAGE_CACHE_SIZE) +
wdata->tailsz;
diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
index f9b5d3d6cf33..1c576e871366 100644
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -86,14 +86,17 @@ cifs_readdir_lookup(struct dentry *parent, struct qstr *name,
dentry = d_lookup(parent, name);
if (dentry) {
+ int err;
inode = dentry->d_inode;
/* update inode in place if i_ino didn't change */
if (inode && CIFS_I(inode)->uniqueid == fattr->cf_uniqueid) {
cifs_fattr_to_inode(inode, fattr);
return dentry;
}
- d_drop(dentry);
+ err = d_invalidate(dentry);
dput(dentry);
+ if (err)
+ return NULL;
}
dentry = d_alloc(parent, name);
diff --git a/fs/cifs/smb1ops.c b/fs/cifs/smb1ops.c
index 56cc4be87807..34cea2798333 100644
--- a/fs/cifs/smb1ops.c
+++ b/fs/cifs/smb1ops.c
@@ -766,7 +766,6 @@ smb_set_file_info(struct inode *inode, const char *full_path,
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
struct tcon_link *tlink = NULL;
struct cifs_tcon *tcon;
- FILE_BASIC_INFO info_buf;
/* if the file is already open for write, just use that fileid */
open_file = find_writable_file(cinode, true);
@@ -817,7 +816,7 @@ smb_set_file_info(struct inode *inode, const char *full_path,
netpid = current->tgid;
set_via_filehandle:
- rc = CIFSSMBSetFileInfo(xid, tcon, &info_buf, netfid, netpid);
+ rc = CIFSSMBSetFileInfo(xid, tcon, buf, netfid, netpid);
if (!rc)
cinode->cifsAttrs = le32_to_cpu(buf->Attributes);
diff --git a/fs/direct-io.c b/fs/direct-io.c
index f86c720dba0e..cf5b44b10c67 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -540,6 +540,7 @@ static int get_more_blocks(struct dio *dio, struct dio_submit *sdio,
sector_t fs_endblk; /* Into file, in filesystem-sized blocks */
unsigned long fs_count; /* Number of filesystem-sized blocks */
int create;
+ unsigned int i_blkbits = sdio->blkbits + sdio->blkfactor;
/*
* If there was a memory error and we've overwritten all the
@@ -554,7 +555,7 @@ static int get_more_blocks(struct dio *dio, struct dio_submit *sdio,
fs_count = fs_endblk - fs_startblk + 1;
map_bh->b_state = 0;
- map_bh->b_size = fs_count << dio->inode->i_blkbits;
+ map_bh->b_size = fs_count << i_blkbits;
/*
* For writes inside i_size on a DIO_SKIP_HOLES filesystem we
@@ -1053,7 +1054,8 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
int seg;
size_t size;
unsigned long addr;
- unsigned blkbits = inode->i_blkbits;
+ unsigned i_blkbits = ACCESS_ONCE(inode->i_blkbits);
+ unsigned blkbits = i_blkbits;
unsigned blocksize_mask = (1 << blkbits) - 1;
ssize_t retval = -EINVAL;
loff_t end = offset;
@@ -1149,7 +1151,7 @@ do_blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
dio->inode = inode;
dio->rw = rw;
sdio.blkbits = blkbits;
- sdio.blkfactor = inode->i_blkbits - blkbits;
+ sdio.blkfactor = i_blkbits - blkbits;
sdio.block_in_file = offset >> blkbits;
sdio.get_block = get_block;
diff --git a/fs/file.c b/fs/file.c
index 7cb71b992603..eff23162485f 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -994,16 +994,18 @@ int iterate_fd(struct files_struct *files, unsigned n,
const void *p)
{
struct fdtable *fdt;
- struct file *file;
int res = 0;
if (!files)
return 0;
spin_lock(&files->file_lock);
- fdt = files_fdtable(files);
- while (!res && n < fdt->max_fds) {
- file = rcu_dereference_check_fdtable(files, fdt->fd[n++]);
- if (file)
- res = f(p, file, n);
+ for (fdt = files_fdtable(files); n < fdt->max_fds; n++) {
+ struct file *file;
+ file = rcu_dereference_check_fdtable(files, fdt->fd[n]);
+ if (!file)
+ continue;
+ res = f(p, file, n);
+ if (res)
+ break;
}
spin_unlock(&files->file_lock);
return res;
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 51ea267d444c..3e3422f7f0a4 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -228,6 +228,8 @@ static void requeue_io(struct inode *inode, struct bdi_writeback *wb)
static void inode_sync_complete(struct inode *inode)
{
inode->i_state &= ~I_SYNC;
+ /* If inode is clean an unused, put it into LRU now... */
+ inode_add_lru(inode);
/* Waiters must see I_SYNC cleared before being woken up */
smp_mb();
wake_up_bit(&inode->i_state, __I_SYNC);
diff --git a/fs/inode.c b/fs/inode.c
index b03c71957246..64999f144153 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -408,6 +408,19 @@ static void inode_lru_list_add(struct inode *inode)
spin_unlock(&inode->i_sb->s_inode_lru_lock);
}
+/*
+ * Add inode to LRU if needed (inode is unused and clean).
+ *
+ * Needs inode->i_lock held.
+ */
+void inode_add_lru(struct inode *inode)
+{
+ if (!(inode->i_state & (I_DIRTY | I_SYNC | I_FREEING | I_WILL_FREE)) &&
+ !atomic_read(&inode->i_count) && inode->i_sb->s_flags & MS_ACTIVE)
+ inode_lru_list_add(inode);
+}
+
+
static void inode_lru_list_del(struct inode *inode)
{
spin_lock(&inode->i_sb->s_inode_lru_lock);
@@ -1390,8 +1403,7 @@ static void iput_final(struct inode *inode)
if (!drop && (sb->s_flags & MS_ACTIVE)) {
inode->i_state |= I_REFERENCED;
- if (!(inode->i_state & (I_DIRTY|I_SYNC)))
- inode_lru_list_add(inode);
+ inode_add_lru(inode);
spin_unlock(&inode->i_lock);
return;
}
diff --git a/fs/internal.h b/fs/internal.h
index 916b7cbf3e3e..2f6af7f645eb 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -110,6 +110,7 @@ extern int open_check_o_direct(struct file *f);
* inode.c
*/
extern spinlock_t inode_sb_list_lock;
+extern void inode_add_lru(struct inode *inode);
/*
* fs-writeback.c
diff --git a/fs/jbd/transaction.c b/fs/jbd/transaction.c
index 78b7f84241d4..7f5120bf0ec2 100644
--- a/fs/jbd/transaction.c
+++ b/fs/jbd/transaction.c
@@ -1961,7 +1961,9 @@ retry:
spin_unlock(&journal->j_list_lock);
jbd_unlock_bh_state(bh);
spin_unlock(&journal->j_state_lock);
+ unlock_buffer(bh);
log_wait_commit(journal, tid);
+ lock_buffer(bh);
goto retry;
}
/*
diff --git a/fs/namei.c b/fs/namei.c
index 937f9d50c84b..5f4cdf3ad913 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2131,6 +2131,11 @@ struct dentry *lookup_one_len(const char *name, struct dentry *base, int len)
if (!len)
return ERR_PTR(-EACCES);
+ if (unlikely(name[0] == '.')) {
+ if (len < 2 || (len == 2 && name[1] == '.'))
+ return ERR_PTR(-EACCES);
+ }
+
while (len--) {
c = *(const unsigned char *)name++;
if (c == '/' || c == '\0')
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index ce8cb926526b..b9e66b7e0c14 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -450,7 +450,8 @@ void nfs_prime_dcache(struct dentry *parent, struct nfs_entry *entry)
nfs_refresh_inode(dentry->d_inode, entry->fattr);
goto out;
} else {
- d_drop(dentry);
+ if (d_invalidate(dentry) != 0)
+ goto out;
dput(dentry);
}
}
@@ -1100,6 +1101,8 @@ out_set_verifier:
out_zap_parent:
nfs_zap_caches(dir);
out_bad:
+ nfs_free_fattr(fattr);
+ nfs_free_fhandle(fhandle);
nfs_mark_for_revalidate(dir);
if (inode && S_ISDIR(inode->i_mode)) {
/* Purge readdir caches. */
@@ -1112,8 +1115,6 @@ out_zap_parent:
shrink_dcache_parent(dentry);
}
d_drop(dentry);
- nfs_free_fattr(fattr);
- nfs_free_fhandle(fhandle);
dput(parent);
dfprintk(LOOKUPCACHE, "NFS: %s(%s/%s) is invalid\n",
__func__, dentry->d_parent->d_name.name,
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 3c231adf8450..9e28356a959a 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1877,8 +1877,9 @@ static struct dentry *proc_map_files_lookup(struct inode *dir,
if (!vma)
goto out_no_vma;
- result = proc_map_files_instantiate(dir, dentry, task,
- (void *)(unsigned long)vma->vm_file->f_mode);
+ if (vma->vm_file)
+ result = proc_map_files_instantiate(dir, dentry, task,
+ (void *)(unsigned long)vma->vm_file->f_mode);
out_no_vma:
up_read(&mm->mmap_sem);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 08:03:39 +0000