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Diffstat (limited to 'fs/sysv/dir.c')
-rw-r--r--fs/sysv/dir.c158
1 files changed, 77 insertions, 81 deletions
diff --git a/fs/sysv/dir.c b/fs/sysv/dir.c
index 2e126d72d619..639307e2ff8c 100644
--- a/fs/sysv/dir.c
+++ b/fs/sysv/dir.c
@@ -28,17 +28,17 @@ const struct file_operations sysv_dir_operations = {
.fsync = generic_file_fsync,
};
-static void dir_commit_chunk(struct page *page, loff_t pos, unsigned len)
+static void dir_commit_chunk(struct folio *folio, loff_t pos, unsigned len)
{
- struct address_space *mapping = page->mapping;
+ struct address_space *mapping = folio->mapping;
struct inode *dir = mapping->host;
- block_write_end(NULL, mapping, pos, len, len, page, NULL);
+ block_write_end(NULL, mapping, pos, len, len, folio, NULL);
if (pos+len > dir->i_size) {
i_size_write(dir, pos+len);
mark_inode_dirty(dir);
}
- unlock_page(page);
+ folio_unlock(folio);
}
static int sysv_handle_dirsync(struct inode *dir)
@@ -52,20 +52,21 @@ static int sysv_handle_dirsync(struct inode *dir)
}
/*
- * Calls to dir_get_page()/unmap_and_put_page() must be nested according to the
+ * Calls to dir_get_folio()/folio_release_kmap() must be nested according to the
* rules documented in mm/highmem.rst.
*
- * NOTE: sysv_find_entry() and sysv_dotdot() act as calls to dir_get_page()
+ * NOTE: sysv_find_entry() and sysv_dotdot() act as calls to dir_get_folio()
* and must be treated accordingly for nesting purposes.
*/
-static void *dir_get_page(struct inode *dir, unsigned long n, struct page **p)
+static void *dir_get_folio(struct inode *dir, unsigned long n,
+ struct folio **foliop)
{
- struct address_space *mapping = dir->i_mapping;
- struct page *page = read_mapping_page(mapping, n, NULL);
- if (IS_ERR(page))
- return ERR_CAST(page);
- *p = page;
- return kmap_local_page(page);
+ struct folio *folio = read_mapping_folio(dir->i_mapping, n, NULL);
+
+ if (IS_ERR(folio))
+ return ERR_CAST(folio);
+ *foliop = folio;
+ return kmap_local_folio(folio, 0);
}
static int sysv_readdir(struct file *file, struct dir_context *ctx)
@@ -87,9 +88,9 @@ static int sysv_readdir(struct file *file, struct dir_context *ctx)
for ( ; n < npages; n++, offset = 0) {
char *kaddr, *limit;
struct sysv_dir_entry *de;
- struct page *page;
+ struct folio *folio;
- kaddr = dir_get_page(inode, n, &page);
+ kaddr = dir_get_folio(inode, n, &folio);
if (IS_ERR(kaddr))
continue;
de = (struct sysv_dir_entry *)(kaddr+offset);
@@ -103,11 +104,11 @@ static int sysv_readdir(struct file *file, struct dir_context *ctx)
if (!dir_emit(ctx, name, strnlen(name,SYSV_NAMELEN),
fs16_to_cpu(SYSV_SB(sb), de->inode),
DT_UNKNOWN)) {
- unmap_and_put_page(page, kaddr);
+ folio_release_kmap(folio, kaddr);
return 0;
}
}
- unmap_and_put_page(page, kaddr);
+ folio_release_kmap(folio, kaddr);
}
return 0;
}
@@ -126,39 +127,35 @@ static inline int namecompare(int len, int maxlen,
/*
* sysv_find_entry()
*
- * finds an entry in the specified directory with the wanted name. It
- * returns the cache buffer in which the entry was found, and the entry
- * itself (as a parameter - res_dir). It does NOT read the inode of the
+ * finds an entry in the specified directory with the wanted name.
+ * It does NOT read the inode of the
* entry - you'll have to do that yourself if you want to.
*
- * On Success unmap_and_put_page() should be called on *res_page.
+ * On Success folio_release_kmap() should be called on *foliop.
*
- * sysv_find_entry() acts as a call to dir_get_page() and must be treated
+ * sysv_find_entry() acts as a call to dir_get_folio() and must be treated
* accordingly for nesting purposes.
*/
-struct sysv_dir_entry *sysv_find_entry(struct dentry *dentry, struct page **res_page)
+struct sysv_dir_entry *sysv_find_entry(struct dentry *dentry, struct folio **foliop)
{
const char * name = dentry->d_name.name;
int namelen = dentry->d_name.len;
struct inode * dir = d_inode(dentry->d_parent);
unsigned long start, n;
unsigned long npages = dir_pages(dir);
- struct page *page = NULL;
struct sysv_dir_entry *de;
- *res_page = NULL;
-
start = SYSV_I(dir)->i_dir_start_lookup;
if (start >= npages)
start = 0;
n = start;
do {
- char *kaddr = dir_get_page(dir, n, &page);
+ char *kaddr = dir_get_folio(dir, n, foliop);
if (!IS_ERR(kaddr)) {
de = (struct sysv_dir_entry *)kaddr;
- kaddr += PAGE_SIZE - SYSV_DIRSIZE;
+ kaddr += folio_size(*foliop) - SYSV_DIRSIZE;
for ( ; (char *) de <= kaddr ; de++) {
if (!de->inode)
continue;
@@ -166,7 +163,7 @@ struct sysv_dir_entry *sysv_find_entry(struct dentry *dentry, struct page **res_
name, de->name))
goto found;
}
- unmap_and_put_page(page, kaddr);
+ folio_release_kmap(*foliop, kaddr);
}
if (++n >= npages)
@@ -177,7 +174,6 @@ struct sysv_dir_entry *sysv_find_entry(struct dentry *dentry, struct page **res_
found:
SYSV_I(dir)->i_dir_start_lookup = n;
- *res_page = page;
return de;
}
@@ -186,7 +182,7 @@ int sysv_add_link(struct dentry *dentry, struct inode *inode)
struct inode *dir = d_inode(dentry->d_parent);
const char * name = dentry->d_name.name;
int namelen = dentry->d_name.len;
- struct page *page = NULL;
+ struct folio *folio = NULL;
struct sysv_dir_entry * de;
unsigned long npages = dir_pages(dir);
unsigned long n;
@@ -196,7 +192,7 @@ int sysv_add_link(struct dentry *dentry, struct inode *inode)
/* We take care of directory expansion in the same loop */
for (n = 0; n <= npages; n++) {
- kaddr = dir_get_page(dir, n, &page);
+ kaddr = dir_get_folio(dir, n, &folio);
if (IS_ERR(kaddr))
return PTR_ERR(kaddr);
de = (struct sysv_dir_entry *)kaddr;
@@ -206,49 +202,49 @@ int sysv_add_link(struct dentry *dentry, struct inode *inode)
goto got_it;
err = -EEXIST;
if (namecompare(namelen, SYSV_NAMELEN, name, de->name))
- goto out_page;
+ goto out_folio;
de++;
}
- unmap_and_put_page(page, kaddr);
+ folio_release_kmap(folio, kaddr);
}
BUG();
return -EINVAL;
got_it:
- pos = page_offset(page) + offset_in_page(de);
- lock_page(page);
- err = sysv_prepare_chunk(page, pos, SYSV_DIRSIZE);
+ pos = folio_pos(folio) + offset_in_folio(folio, de);
+ folio_lock(folio);
+ err = sysv_prepare_chunk(folio, pos, SYSV_DIRSIZE);
if (err)
goto out_unlock;
memcpy (de->name, name, namelen);
memset (de->name + namelen, 0, SYSV_DIRSIZE - namelen - 2);
de->inode = cpu_to_fs16(SYSV_SB(inode->i_sb), inode->i_ino);
- dir_commit_chunk(page, pos, SYSV_DIRSIZE);
+ dir_commit_chunk(folio, pos, SYSV_DIRSIZE);
inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir));
mark_inode_dirty(dir);
err = sysv_handle_dirsync(dir);
-out_page:
- unmap_and_put_page(page, kaddr);
+out_folio:
+ folio_release_kmap(folio, kaddr);
return err;
out_unlock:
- unlock_page(page);
- goto out_page;
+ folio_unlock(folio);
+ goto out_folio;
}
-int sysv_delete_entry(struct sysv_dir_entry *de, struct page *page)
+int sysv_delete_entry(struct sysv_dir_entry *de, struct folio *folio)
{
- struct inode *inode = page->mapping->host;
- loff_t pos = page_offset(page) + offset_in_page(de);
+ struct inode *inode = folio->mapping->host;
+ loff_t pos = folio_pos(folio) + offset_in_folio(folio, de);
int err;
- lock_page(page);
- err = sysv_prepare_chunk(page, pos, SYSV_DIRSIZE);
+ folio_lock(folio);
+ err = sysv_prepare_chunk(folio, pos, SYSV_DIRSIZE);
if (err) {
- unlock_page(page);
+ folio_unlock(folio);
return err;
}
de->inode = 0;
- dir_commit_chunk(page, pos, SYSV_DIRSIZE);
+ dir_commit_chunk(folio, pos, SYSV_DIRSIZE);
inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
mark_inode_dirty(inode);
return sysv_handle_dirsync(inode);
@@ -256,33 +252,33 @@ int sysv_delete_entry(struct sysv_dir_entry *de, struct page *page)
int sysv_make_empty(struct inode *inode, struct inode *dir)
{
- struct page *page = grab_cache_page(inode->i_mapping, 0);
+ struct folio *folio = filemap_grab_folio(inode->i_mapping, 0);
struct sysv_dir_entry * de;
- char *base;
+ char *kaddr;
int err;
- if (!page)
- return -ENOMEM;
- err = sysv_prepare_chunk(page, 0, 2 * SYSV_DIRSIZE);
+ if (IS_ERR(folio))
+ return PTR_ERR(folio);
+ err = sysv_prepare_chunk(folio, 0, 2 * SYSV_DIRSIZE);
if (err) {
- unlock_page(page);
+ folio_unlock(folio);
goto fail;
}
- base = kmap_local_page(page);
- memset(base, 0, PAGE_SIZE);
+ kaddr = kmap_local_folio(folio, 0);
+ memset(kaddr, 0, folio_size(folio));
- de = (struct sysv_dir_entry *) base;
+ de = (struct sysv_dir_entry *)kaddr;
de->inode = cpu_to_fs16(SYSV_SB(inode->i_sb), inode->i_ino);
strcpy(de->name,".");
de++;
de->inode = cpu_to_fs16(SYSV_SB(inode->i_sb), dir->i_ino);
strcpy(de->name,"..");
- kunmap_local(base);
- dir_commit_chunk(page, 0, 2 * SYSV_DIRSIZE);
+ kunmap_local(kaddr);
+ dir_commit_chunk(folio, 0, 2 * SYSV_DIRSIZE);
err = sysv_handle_dirsync(inode);
fail:
- put_page(page);
+ folio_put(folio);
return err;
}
@@ -292,19 +288,19 @@ fail:
int sysv_empty_dir(struct inode * inode)
{
struct super_block *sb = inode->i_sb;
- struct page *page = NULL;
+ struct folio *folio = NULL;
unsigned long i, npages = dir_pages(inode);
char *kaddr;
for (i = 0; i < npages; i++) {
struct sysv_dir_entry *de;
- kaddr = dir_get_page(inode, i, &page);
+ kaddr = dir_get_folio(inode, i, &folio);
if (IS_ERR(kaddr))
continue;
de = (struct sysv_dir_entry *)kaddr;
- kaddr += PAGE_SIZE-SYSV_DIRSIZE;
+ kaddr += folio_size(folio) - SYSV_DIRSIZE;
for ( ;(char *)de <= kaddr; de++) {
if (!de->inode)
@@ -321,46 +317,46 @@ int sysv_empty_dir(struct inode * inode)
if (de->name[1] != '.' || de->name[2])
goto not_empty;
}
- unmap_and_put_page(page, kaddr);
+ folio_release_kmap(folio, kaddr);
}
return 1;
not_empty:
- unmap_and_put_page(page, kaddr);
+ folio_release_kmap(folio, kaddr);
return 0;
}
/* Releases the page */
-int sysv_set_link(struct sysv_dir_entry *de, struct page *page,
- struct inode *inode)
+int sysv_set_link(struct sysv_dir_entry *de, struct folio *folio,
+ struct inode *inode)
{
- struct inode *dir = page->mapping->host;
- loff_t pos = page_offset(page) + offset_in_page(de);
+ struct inode *dir = folio->mapping->host;
+ loff_t pos = folio_pos(folio) + offset_in_folio(folio, de);
int err;
- lock_page(page);
- err = sysv_prepare_chunk(page, pos, SYSV_DIRSIZE);
+ folio_lock(folio);
+ err = sysv_prepare_chunk(folio, pos, SYSV_DIRSIZE);
if (err) {
- unlock_page(page);
+ folio_unlock(folio);
return err;
}
de->inode = cpu_to_fs16(SYSV_SB(inode->i_sb), inode->i_ino);
- dir_commit_chunk(page, pos, SYSV_DIRSIZE);
+ dir_commit_chunk(folio, pos, SYSV_DIRSIZE);
inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir));
mark_inode_dirty(dir);
return sysv_handle_dirsync(inode);
}
/*
- * Calls to dir_get_page()/unmap_and_put_page() must be nested according to the
+ * Calls to dir_get_folio()/folio_release_kmap() must be nested according to the
* rules documented in mm/highmem.rst.
*
- * sysv_dotdot() acts as a call to dir_get_page() and must be treated
+ * sysv_dotdot() acts as a call to dir_get_folio() and must be treated
* accordingly for nesting purposes.
*/
-struct sysv_dir_entry *sysv_dotdot(struct inode *dir, struct page **p)
+struct sysv_dir_entry *sysv_dotdot(struct inode *dir, struct folio **foliop)
{
- struct sysv_dir_entry *de = dir_get_page(dir, 0, p);
+ struct sysv_dir_entry *de = dir_get_folio(dir, 0, foliop);
if (IS_ERR(de))
return NULL;
@@ -370,13 +366,13 @@ struct sysv_dir_entry *sysv_dotdot(struct inode *dir, struct page **p)
ino_t sysv_inode_by_name(struct dentry *dentry)
{
- struct page *page;
- struct sysv_dir_entry *de = sysv_find_entry (dentry, &page);
+ struct folio *folio;
+ struct sysv_dir_entry *de = sysv_find_entry (dentry, &folio);
ino_t res = 0;
if (de) {
res = fs16_to_cpu(SYSV_SB(dentry->d_sb), de->inode);
- unmap_and_put_page(page, de);
+ folio_release_kmap(folio, de);
}
return res;
}
generated by cgit v1.2.3 (git 2.39.0) at 2024-10-21 13:52:01 +0300