[18/41] Use page_cache_xxx in fs/reiserfs

From: Christoph Lameter
Date: Tue Sep 11 2007 - 02:26:04 EST

Use page_cache_xxx in fs/reiserfs

Signed-off-by: Christoph Lameter <clameter@xxxxxxx>
---
fs/reiserfs/file.c | 71 +++++++++++++++++++++++------------------
fs/reiserfs/inode.c | 33 +++++++++++-------
fs/reiserfs/ioctl.c | 2 +-
fs/reiserfs/stree.c | 8 +++--
fs/reiserfs/tail_conversion.c | 5 ++-
fs/reiserfs/xattr.c | 19 ++++++-----
6 files changed, 79 insertions(+), 59 deletions(-)

diff --git a/fs/reiserfs/file.c b/fs/reiserfs/file.c
index 72ad7f3..4b9f009 100644
--- a/fs/reiserfs/file.c
+++ b/fs/reiserfs/file.c
@@ -187,9 +187,11 @@ static int reiserfs_allocate_blocks_for_region(struct reiserfs_transaction_handl
int curr_block; // current block used to keep track of unmapped blocks.
int i; // loop counter
int itempos; // position in item
- unsigned int from = (pos & (PAGE_CACHE_SIZE - 1)); // writing position in
+ struct address_space *mapping = prepared_pages[0]->mapping;
+ unsigned int from = page_cache_offset(mapping, pos); // writing position in
// first page
- unsigned int to = ((pos + write_bytes - 1) & (PAGE_CACHE_SIZE - 1)) + 1; /* last modified byte offset in last page */
+ unsigned int to = page_cache_offset(mapping, pos + write_bytes - 1) + 1;
+ /* last modified byte offset in last page */
__u64 hole_size; // amount of blocks for a file hole, if it needed to be created.
int modifying_this_item = 0; // Flag for items traversal code to keep track
// of the fact that we already prepared
@@ -731,19 +733,22 @@ static int reiserfs_copy_from_user_to_file_region(loff_t pos, /* In-file positio
long page_fault = 0; // status of copy_from_user.
int i; // loop counter.
int offset; // offset in page
+ struct address_space *mapping = prepared_pages[0]->mapping;

- for (i = 0, offset = (pos & (PAGE_CACHE_SIZE - 1)); i < num_pages;
+ for (i = 0, offset = page_cache_offset(mapping, pos); i < num_pages;
i++, offset = 0) {
- size_t count = min_t(size_t, PAGE_CACHE_SIZE - offset, write_bytes); // How much of bytes to write to this page
+ size_t count = min_t(size_t, page_cache_size(mapping) - offset,
+ write_bytes); // How much of bytes to write to this page
struct page *page = prepared_pages[i]; // Current page we process.

fault_in_pages_readable(buf, count);

/* Copy data from userspace to the current page */
kmap(page);
- page_fault = __copy_from_user(page_address(page) + offset, buf, count); // Copy the data.
+ page_fault = __copy_from_user(page_address(page) + offset, buf, count);
+ // Copy the data.
/* Flush processor's dcache for this page */
- flush_dcache_page(page);
+ flush_dcache_page(page);
kunmap(page);
buf += count;
write_bytes -= count;
@@ -763,11 +768,12 @@ int reiserfs_commit_page(struct inode *inode, struct page *page,
int partial = 0;
unsigned blocksize;
struct buffer_head *bh, *head;
- unsigned long i_size_index = inode->i_size >> PAGE_CACHE_SHIFT;
+ unsigned long i_size_index =
+ page_cache_index(inode->i_mapping, inode->i_size);
int new;
int logit = reiserfs_file_data_log(inode);
struct super_block *s = inode->i_sb;
- int bh_per_page = PAGE_CACHE_SIZE / s->s_blocksize;
+ int bh_per_page = page_cache_size(inode->i_mapping) / s->s_blocksize;
struct reiserfs_transaction_handle th;
int ret = 0;

@@ -839,10 +845,11 @@ static int reiserfs_submit_file_region_for_write(struct reiserfs_transaction_han
int offset; // Writing offset in page.
int orig_write_bytes = write_bytes;
int sd_update = 0;
+ struct address_space *mapping = inode->i_mapping;

- for (i = 0, offset = (pos & (PAGE_CACHE_SIZE - 1)); i < num_pages;
+ for (i = 0, offset = page_cache_offset(mapping, pos); i < num_pages;
i++, offset = 0) {
- int count = min_t(int, PAGE_CACHE_SIZE - offset, write_bytes); // How much of bytes to write to this page
+ int count = min_t(int, page_cache_size(mapping) - offset, write_bytes); // How much of bytes to write to this page
struct page *page = prepared_pages[i]; // Current page we process.

status =
@@ -985,12 +992,12 @@ static int reiserfs_prepare_file_region_for_write(struct inode *inode
)
{
int res = 0; // Return values of different functions we call.
- unsigned long index = pos >> PAGE_CACHE_SHIFT; // Offset in file in pages.
- int from = (pos & (PAGE_CACHE_SIZE - 1)); // Writing offset in first page
- int to = ((pos + write_bytes - 1) & (PAGE_CACHE_SIZE - 1)) + 1;
+ struct address_space *mapping = inode->i_mapping; // Pages are mapped here.
+ unsigned long index = page_cache_index(mapping, pos); // Offset in file in pages.
+ int from = page_cache_offset(mapping, pos); // Writing offset in first page
+ int to = page_cache_offset(mapping, pos + write_bytes - 1) + 1;
/* offset of last modified byte in last
page */
- struct address_space *mapping = inode->i_mapping; // Pages are mapped here.
int i; // Simple counter
int blocks = 0; /* Return value (blocks that should be allocated) */
struct buffer_head *bh, *head; // Current bufferhead and first bufferhead
@@ -1041,30 +1048,31 @@ static int reiserfs_prepare_file_region_for_write(struct inode *inode
/* These are full-overwritten pages so we count all the blocks in
these pages are counted as needed to be allocated */
blocks =
- (num_pages - 2) << (PAGE_CACHE_SHIFT - inode->i_blkbits);
+ (num_pages - 2) << (page_cache_shift(mapping) - inode->i_blkbits);

/* count blocks needed for first page (possibly partially written) */
- blocks += ((PAGE_CACHE_SIZE - from) >> inode->i_blkbits) + !!(from & (inode->i_sb->s_blocksize - 1)); /* roundup */
+ blocks += ((page_cache_size(mapping) - from) >> inode->i_blkbits)
+ + !!(from & (inode->i_sb->s_blocksize - 1)); /* roundup */

/* Now we account for last page. If last page == first page (we
overwrite only one page), we substract all the blocks past the
last writing position in a page out of already calculated number
of blocks */
- blocks += ((num_pages > 1) << (PAGE_CACHE_SHIFT - inode->i_blkbits)) -
- ((PAGE_CACHE_SIZE - to) >> inode->i_blkbits);
+ blocks += ((num_pages > 1) << (page_cache_shift(mapping) - inode->i_blkbits)) -
+ ((page_cache_size(mapping) - to) >> inode->i_blkbits);
/* Note how we do not roundup here since partial blocks still
should be allocated */

/* Now if all the write area lies past the file end, no point in
maping blocks, since there is none, so we just zero out remaining
parts of first and last pages in write area (if needed) */
- if ((pos & ~((loff_t) PAGE_CACHE_SIZE - 1)) > inode->i_size) {
+ if ((pos & page_cache_mask(mapping)) > inode->i_size) {
if (from != 0) /* First page needs to be partially zeroed */
zero_user(prepared_pages[0], 0, from);

- if (to != PAGE_CACHE_SIZE) /* Last page needs to be partially zeroed */
+ if (to != page_cache_size(mapping)) /* Last page needs to be partially zeroed */
zero_user_segment(prepared_pages[num_pages-1], to,
- PAGE_CACHE_SIZE);
+ page_cache_size(mapping));

/* Since all blocks are new - use already calculated value */
return blocks;
@@ -1201,8 +1209,8 @@ static int reiserfs_prepare_file_region_for_write(struct inode *inode

/* Last page, see if it is not uptodate, or if the last page is past the end of the file. */
if (!PageUptodate(prepared_pages[num_pages - 1]) ||
- ((pos + write_bytes) >> PAGE_CACHE_SHIFT) >
- (inode->i_size >> PAGE_CACHE_SHIFT)) {
+ page_cache_index(mapping, pos + write_bytes) >
+ page_cache_index(mapping, inode->i_size)) {
head = page_buffers(prepared_pages[num_pages - 1]);

/* for each buffer in page */
@@ -1292,6 +1300,7 @@ static ssize_t reiserfs_file_write(struct file *file, /* the file we are going t
locked pages in array for now */
struct page *prepared_pages[REISERFS_WRITE_PAGES_AT_A_TIME];
struct reiserfs_transaction_handle th;
+ struct address_space *mapping = inode->i_mapping;
th.t_trans_id = 0;

/* If a filesystem is converted from 3.5 to 3.6, we'll have v3.5 items
@@ -1358,10 +1367,10 @@ static ssize_t reiserfs_file_write(struct file *file, /* the file we are going t
size_t blocks_to_allocate; /* how much blocks we need to allocate for this iteration */

/* (pos & (PAGE_CACHE_SIZE-1)) is an idiom for offset into a page of pos */
- num_pages = !!((pos + count) & (PAGE_CACHE_SIZE - 1)) + /* round up partial
+ num_pages = !!(page_cache_offset(mapping, pos + count)) + /* round up partial
pages */
((count +
- (pos & (PAGE_CACHE_SIZE - 1))) >> PAGE_CACHE_SHIFT);
+ (pos & (page_cache_size(mapping) - 1))) >> page_cache_shift(mapping));
/* convert size to amount of
pages */
reiserfs_write_lock(inode->i_sb);
@@ -1374,8 +1383,8 @@ static ssize_t reiserfs_file_write(struct file *file, /* the file we are going t
min_t(size_t, REISERFS_WRITE_PAGES_AT_A_TIME,
reiserfs_can_fit_pages(inode->i_sb));
/* Also we should not forget to set size in bytes accordingly */
- write_bytes = (num_pages << PAGE_CACHE_SHIFT) -
- (pos & (PAGE_CACHE_SIZE - 1));
+ write_bytes = (num_pages << page_cache_shift(mapping)) -
+ page_cache_offset(mapping, pos);
/* If position is not on the
start of the page, we need
to substract the offset
@@ -1387,7 +1396,7 @@ static ssize_t reiserfs_file_write(struct file *file, /* the file we are going t
we still have the space to write the blocks to */
reiserfs_claim_blocks_to_be_allocated(inode->i_sb,
num_pages <<
- (PAGE_CACHE_SHIFT -
+ (page_cache_shift(mapping) -
inode->i_blkbits));
reiserfs_write_unlock(inode->i_sb);

@@ -1412,7 +1421,7 @@ static ssize_t reiserfs_file_write(struct file *file, /* the file we are going t
// No blocks were claimed before, so do it now.
reiserfs_claim_blocks_to_be_allocated(inode->i_sb,
1 <<
- (PAGE_CACHE_SHIFT
+ (page_cache_shift(mapping)
-
inode->
i_blkbits));
@@ -1429,7 +1438,7 @@ static ssize_t reiserfs_file_write(struct file *file, /* the file we are going t
if (res < 0) {
reiserfs_release_claimed_blocks(inode->i_sb,
num_pages <<
- (PAGE_CACHE_SHIFT -
+ (page_cache_shift(mapping) -
inode->i_blkbits));
break;
}
@@ -1439,7 +1448,7 @@ static ssize_t reiserfs_file_write(struct file *file, /* the file we are going t
/* First we correct our estimate of how many blocks we need */
reiserfs_release_claimed_blocks(inode->i_sb,
(num_pages <<
- (PAGE_CACHE_SHIFT -
+ (page_cache_shift(mapping) -
inode->i_sb->
s_blocksize_bits)) -
blocks_to_allocate);
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index e6684e3..3814705 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -336,7 +336,8 @@ static int _get_block_create_0(struct inode *inode, long block,
goto finished;
}
// read file tail into part of page
- offset = (cpu_key_k_offset(&key) - 1) & (PAGE_CACHE_SIZE - 1);
+ offset = page_cache_offset(inode->i_mapping,
+ cpu_key_k_offset(&key) - 1);
fs_gen = get_generation(inode->i_sb);
copy_item_head(&tmp_ih, ih);

@@ -522,10 +523,10 @@ static int convert_tail_for_hole(struct inode *inode,
return -EIO;

/* always try to read until the end of the block */
- tail_start = tail_offset & (PAGE_CACHE_SIZE - 1);
+ tail_start = page_cache_offset(inode->i_mapping, tail_offset);
tail_end = (tail_start | (bh_result->b_size - 1)) + 1;

- index = tail_offset >> PAGE_CACHE_SHIFT;
+ index = page_cache_index(inode->i_mapping, tail_offset);
/* hole_page can be zero in case of direct_io, we are sure
that we cannot get here if we write with O_DIRECT into
tail page */
@@ -2007,11 +2008,13 @@ static int grab_tail_page(struct inode *p_s_inode,
/* we want the page with the last byte in the file,
** not the page that will hold the next byte for appending
*/
- unsigned long index = (p_s_inode->i_size - 1) >> PAGE_CACHE_SHIFT;
+ unsigned long index = page_cache_index(p_s_inode->i_mapping,
+ p_s_inode->i_size - 1);
unsigned long pos = 0;
unsigned long start = 0;
unsigned long blocksize = p_s_inode->i_sb->s_blocksize;
- unsigned long offset = (p_s_inode->i_size) & (PAGE_CACHE_SIZE - 1);
+ unsigned long offset = page_cache_index(p_s_inode->i_mapping,
+ p_s_inode->i_size);
struct buffer_head *bh;
struct buffer_head *head;
struct page *page;
@@ -2083,7 +2086,8 @@ int reiserfs_truncate_file(struct inode *p_s_inode, int update_timestamps)
{
struct reiserfs_transaction_handle th;
/* we want the offset for the first byte after the end of the file */
- unsigned long offset = p_s_inode->i_size & (PAGE_CACHE_SIZE - 1);
+ unsigned long offset = page_cache_offset(p_s_inode->i_mapping,
+ p_s_inode->i_size);
unsigned blocksize = p_s_inode->i_sb->s_blocksize;
unsigned length;
struct page *page = NULL;
@@ -2232,7 +2236,7 @@ static int map_block_for_writepage(struct inode *inode,
} else if (is_direct_le_ih(ih)) {
char *p;
p = page_address(bh_result->b_page);
- p += (byte_offset - 1) & (PAGE_CACHE_SIZE - 1);
+ p += page_cache_offset(inode->i_mapping, byte_offset - 1);
copy_size = ih_item_len(ih) - pos_in_item;

fs_gen = get_generation(inode->i_sb);
@@ -2331,7 +2335,8 @@ static int reiserfs_write_full_page(struct page *page,
struct writeback_control *wbc)
{
struct inode *inode = page->mapping->host;
- unsigned long end_index = inode->i_size >> PAGE_CACHE_SHIFT;
+ unsigned long end_index = page_cache_index(inode->i_mapping,
+ inode->i_size);
int error = 0;
unsigned long block;
sector_t last_block;
@@ -2341,7 +2346,7 @@ static int reiserfs_write_full_page(struct page *page,
int checked = PageChecked(page);
struct reiserfs_transaction_handle th;
struct super_block *s = inode->i_sb;
- int bh_per_page = PAGE_CACHE_SIZE / s->s_blocksize;
+ int bh_per_page = page_cache_size(inode->i_mapping) / s->s_blocksize;
th.t_trans_id = 0;

/* no logging allowed when nonblocking or from PF_MEMALLOC */
@@ -2368,16 +2373,18 @@ static int reiserfs_write_full_page(struct page *page,
if (page->index >= end_index) {
unsigned last_offset;

- last_offset = inode->i_size & (PAGE_CACHE_SIZE - 1);
+ last_offset = page_cache_offset(inode->i_mapping, inode->i_size);
/* no file contents in this page */
if (page->index >= end_index + 1 || !last_offset) {
unlock_page(page);
return 0;
}
- zero_user_segment(page, last_offset, PAGE_CACHE_SIZE);
+ zero_user_segment(page, last_offset,
+ page_cache_size(inode->i_mapping));
}
bh = head;
- block = page->index << (PAGE_CACHE_SHIFT - s->s_blocksize_bits);
+ block = page->index << (page_cache_shift(inode->i_mapping)
+ - s->s_blocksize_bits);
last_block = (i_size_read(inode) - 1) >> inode->i_blkbits;
/* first map all the buffers, logging any direct items we find */
do {
@@ -2608,7 +2615,7 @@ static int reiserfs_commit_write(struct file *f, struct page *page,
unsigned from, unsigned to)
{
struct inode *inode = page->mapping->host;
- loff_t pos = ((loff_t) page->index << PAGE_CACHE_SHIFT) + to;
+ loff_t pos = page_cache_pos(page->mapping, page->index, to);
int ret = 0;
int update_sd = 0;
struct reiserfs_transaction_handle *th = NULL;
diff --git a/fs/reiserfs/ioctl.c b/fs/reiserfs/ioctl.c
index 11a0fcc..02ddd90 100644
--- a/fs/reiserfs/ioctl.c
+++ b/fs/reiserfs/ioctl.c
@@ -168,8 +168,8 @@ static int reiserfs_unpack(struct inode *inode, struct file *filp)
** reiserfs_prepare_write on that page. This will force a
** reiserfs_get_block to unpack the tail for us.
*/
- index = inode->i_size >> PAGE_CACHE_SHIFT;
mapping = inode->i_mapping;
+ index = page_cache_index(mapping, inode->i_size);
page = grab_cache_page(mapping, index);
retval = -ENOMEM;
if (!page) {
diff --git a/fs/reiserfs/stree.c b/fs/reiserfs/stree.c
index 981027d..8626155 100644
--- a/fs/reiserfs/stree.c
+++ b/fs/reiserfs/stree.c
@@ -1283,7 +1283,8 @@ int reiserfs_delete_item(struct reiserfs_transaction_handle *th, struct treepath
*/

data = kmap_atomic(p_s_un_bh->b_page, KM_USER0);
- off = ((le_ih_k_offset(&s_ih) - 1) & (PAGE_CACHE_SIZE - 1));
+ off = page_cache_offset(p_s_inode->i_mapping,
+ le_ih_k_offset(&s_ih) - 1);
memcpy(data + off,
B_I_PITEM(PATH_PLAST_BUFFER(p_s_path), &s_ih),
n_ret_value);
@@ -1439,7 +1440,7 @@ static void unmap_buffers(struct page *page, loff_t pos)

if (page) {
if (page_has_buffers(page)) {
- tail_index = pos & (PAGE_CACHE_SIZE - 1);
+ tail_index = page_cache_offset(page_mapping(page), pos);
cur_index = 0;
head = page_buffers(page);
bh = head;
@@ -1459,7 +1460,8 @@ static void unmap_buffers(struct page *page, loff_t pos)
bh = next;
} while (bh != head);
if (PAGE_SIZE == bh->b_size) {
- cancel_dirty_page(page, PAGE_CACHE_SIZE);
+ cancel_dirty_page(page,
+ page_cache_size(page_mapping(page)));
}
}
}
diff --git a/fs/reiserfs/tail_conversion.c b/fs/reiserfs/tail_conversion.c
index f8121a1..2c2ab6b 100644
--- a/fs/reiserfs/tail_conversion.c
+++ b/fs/reiserfs/tail_conversion.c
@@ -128,7 +128,8 @@ int direct2indirect(struct reiserfs_transaction_handle *th, struct inode *inode,
*/
if (up_to_date_bh) {
unsigned pgoff =
- (tail_offset + total_tail - 1) & (PAGE_CACHE_SIZE - 1);
+ page_cache_offset(inode->i_mapping,
+ tail_offset + total_tail - 1);
char *kaddr = kmap_atomic(up_to_date_bh->b_page, KM_USER0);
memset(kaddr + pgoff, 0, n_blk_size - total_tail);
kunmap_atomic(kaddr, KM_USER0);
@@ -238,7 +239,7 @@ int indirect2direct(struct reiserfs_transaction_handle *th, struct inode *p_s_in
** the page was locked and this part of the page was up to date when
** indirect2direct was called, so we know the bytes are still valid
*/
- tail = tail + (pos & (PAGE_CACHE_SIZE - 1));
+ tail = tail + page_cache_offset(p_s_inode->i_mapping, pos);

PATH_LAST_POSITION(p_s_path)++;

diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index bf6e582..c86f570 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -487,13 +487,13 @@ reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer,
while (buffer_pos < buffer_size || buffer_pos == 0) {
size_t chunk;
size_t skip = 0;
- size_t page_offset = (file_pos & (PAGE_CACHE_SIZE - 1));
- if (buffer_size - buffer_pos > PAGE_CACHE_SIZE)
- chunk = PAGE_CACHE_SIZE;
+ size_t page_offset = page_cache_offset(mapping, file_pos);
+ if (buffer_size - buffer_pos > page_cache_size(mapping))
+ chunk = page_cache_size(mapping);
else
chunk = buffer_size - buffer_pos;

- page = reiserfs_get_page(xinode, file_pos >> PAGE_CACHE_SHIFT);
+ page = reiserfs_get_page(xinode, page_cache_index(mapping, file_pos));
if (IS_ERR(page)) {
err = PTR_ERR(page);
goto out_filp;
@@ -505,8 +505,8 @@ reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer,
if (file_pos == 0) {
struct reiserfs_xattr_header *rxh;
skip = file_pos = sizeof(struct reiserfs_xattr_header);
- if (chunk + skip > PAGE_CACHE_SIZE)
- chunk = PAGE_CACHE_SIZE - skip;
+ if (chunk + skip > page_cache_size(mapping))
+ chunk = page_cache_size(mapping) - skip;
rxh = (struct reiserfs_xattr_header *)data;
rxh->h_magic = cpu_to_le32(REISERFS_XATTR_MAGIC);
rxh->h_hash = cpu_to_le32(xahash);
@@ -597,12 +597,13 @@ reiserfs_xattr_get(const struct inode *inode, const char *name, void *buffer,
size_t chunk;
char *data;
size_t skip = 0;
- if (isize - file_pos > PAGE_CACHE_SIZE)
- chunk = PAGE_CACHE_SIZE;
+ if (isize - file_pos > page_cache_size(xinode->i_mapping))
+ chunk = page_cache_size(xinode->i_mapping);
else
chunk = isize - file_pos;

- page = reiserfs_get_page(xinode, file_pos >> PAGE_CACHE_SHIFT);
+ page = reiserfs_get_page(xinode,
+ page_cache_index(xinode->i_mapping, file_pos));
if (IS_ERR(page)) {
err = PTR_ERR(page);
goto out_dput;
--
1.5.2.5

--
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