Release 4.10 fs/fat/inode.c

/*
 *  linux/fs/fat/inode.c
 *
 *  Written 1992,1993 by Werner Almesberger
 *  VFAT extensions by Gordon Chaffee, merged with msdos fs by Henrik Storner
 *  Rewritten for the constant inumbers support by Al Viro
 *
 *  Fixes:
 *
 *      Max Cohan: Fixed invalid FSINFO offset when info_sector is 0
 */

#include <linux/module.h>
#include <linux/pagemap.h>
#include <linux/mpage.h>
#include <linux/vfs.h>
#include <linux/seq_file.h>
#include <linux/parser.h>
#include <linux/uio.h>
#include <linux/blkdev.h>
#include <linux/backing-dev.h>
#include <asm/unaligned.h>
#include "fat.h"

#ifndef CONFIG_FAT_DEFAULT_IOCHARSET
/* if user don't select VFAT, this is undefined. */

#define CONFIG_FAT_DEFAULT_IOCHARSET	""
#endif


#define KB_IN_SECTORS 2

/*
 * A deserialized copy of the on-disk structure laid out in struct
 * fat_boot_sector.
 */

struct fat_bios_param_block {
	
u16	fat_sector_size;
	
u8	fat_sec_per_clus;
	
u16	fat_reserved;
	
u8	fat_fats;
	
u16	fat_dir_entries;
	
u16	fat_sectors;
	
u16	fat_fat_length;
	
u32	fat_total_sect;

	
u8	fat16_state;
	
u32	fat16_vol_id;

	
u32	fat32_length;
	
u32	fat32_root_cluster;
	
u16	fat32_info_sector;
	
u8	fat32_state;
	
u32	fat32_vol_id;
};


static int fat_default_codepage = CONFIG_FAT_DEFAULT_CODEPAGE;

static char fat_default_iocharset[] = CONFIG_FAT_DEFAULT_IOCHARSET;


static struct fat_floppy_defaults {
	
unsigned nr_sectors;
	
unsigned sec_per_clus;
	
unsigned dir_entries;
	
unsigned media;
	
unsigned fat_length;
} 
floppy_defaults[] = {
{
	.nr_sectors = 160 * KB_IN_SECTORS,
	.sec_per_clus = 1,
	.dir_entries = 64,
	.media = 0xFE,
	.fat_length = 1,
},
{
	.nr_sectors = 180 * KB_IN_SECTORS,
	.sec_per_clus = 1,
	.dir_entries = 64,
	.media = 0xFC,
	.fat_length = 2,
},
{
	.nr_sectors = 320 * KB_IN_SECTORS,
	.sec_per_clus = 2,
	.dir_entries = 112,
	.media = 0xFF,
	.fat_length = 1,
},
{
	.nr_sectors = 360 * KB_IN_SECTORS,
	.sec_per_clus = 2,
	.dir_entries = 112,
	.media = 0xFD,
	.fat_length = 2,
},
};



int fat_add_cluster(struct inode *inode)
{
	int err, cluster;

	err = fat_alloc_clusters(inode, &cluster, 1);
	if (err)
		return err;
	/* FIXME: this cluster should be added after data of this
         * cluster is writed */
	err = fat_chain_add(inode, cluster, 1);
	if (err)
		fat_free_clusters(inode, cluster);
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hirofumi ogawa
hirofumi ogawa
60
100.00%
1
100.00%
Total
60
100.00%
1
100.00%



static inline int __fat_get_block(struct inode *inode, sector_t iblock,
				  unsigned long *max_blocks,
				  struct buffer_head *bh_result, int create)
{
	struct super_block *sb = inode->i_sb;
	struct msdos_sb_info *sbi = MSDOS_SB(sb);
	unsigned long mapped_blocks;
	sector_t phys, last_block;
	int err, offset;

	err = fat_bmap(inode, iblock, &phys, &mapped_blocks, create, false);
	if (err)
		return err;
	if (phys) {
		map_bh(bh_result, sb, phys);
		*max_blocks = min(mapped_blocks, *max_blocks);
		return 0;
	}
	if (!create)
		return 0;

	if (iblock != MSDOS_I(inode)->mmu_private >> sb->s_blocksize_bits) {
		fat_fs_error(sb, "corrupted file size (i_pos %lld, %lld)",
			MSDOS_I(inode)->i_pos, MSDOS_I(inode)->mmu_private);
		return -EIO;
	}

	last_block = inode->i_blocks >> (sb->s_blocksize_bits - 9);
	offset = (unsigned long)iblock & (sbi->sec_per_clus - 1);
	/*
         * allocate a cluster according to the following.
         * 1) no more available blocks
         * 2) not part of fallocate region
         */
	if (!offset && !(iblock < last_block)) {
		/* TODO: multiple cluster allocation would be desirable. */
		err = fat_add_cluster(inode);
		if (err)
			return err;
	}
	/* available blocks on this cluster */
	mapped_blocks = sbi->sec_per_clus - offset;

	*max_blocks = min(mapped_blocks, *max_blocks);
	MSDOS_I(inode)->mmu_private += *max_blocks << sb->s_blocksize_bits;

	err = fat_bmap(inode, iblock, &phys, &mapped_blocks, create, false);
	if (err)
		return err;

	BUG_ON(!phys);
	BUG_ON(*max_blocks != mapped_blocks);
	set_buffer_new(bh_result);
	map_bh(bh_result, sb, phys);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hirofumi ogawa
hirofumi ogawa
227
71.61%
7
36.84%
pre-git
pre-git
49
15.46%
7
36.84%
namjae jeon
namjae jeon
28
8.83%
2
10.53%
christoph hellwig
christoph hellwig
11
3.47%
1
5.26%
linus torvalds
linus torvalds
1
0.32%
1
5.26%
denis karpov
denis karpov
1
0.32%
1
5.26%
Total
317
100.00%
19
100.00%



static int fat_get_block(struct inode *inode, sector_t iblock,
			 struct buffer_head *bh_result, int create)
{
	struct super_block *sb = inode->i_sb;
	unsigned long max_blocks = bh_result->b_size >> inode->i_blkbits;
	int err;

	err = __fat_get_block(inode, iblock, &max_blocks, bh_result, create);
	if (err)
		return err;
	bh_result->b_size = max_blocks << sb->s_blocksize_bits;
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hirofumi ogawa
hirofumi ogawa
70
85.37%
2
66.67%
badari pulavarty
badari pulavarty
12
14.63%
1
33.33%
Total
82
100.00%
3
100.00%



static int fat_writepage(struct page *page, struct writeback_control *wbc)
{
	return block_write_full_page(page, fat_get_block, wbc);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hirofumi ogawa
hirofumi ogawa
18
69.23%
2
66.67%
pre-git
pre-git
8
30.77%
1
33.33%
Total
26
100.00%
3
100.00%



static int fat_writepages(struct address_space *mapping,
			  struct writeback_control *wbc)
{
	return mpage_writepages(mapping, wbc, fat_get_block);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hirofumi ogawa
hirofumi ogawa
26
100.00%
1
100.00%
Total
26
100.00%
1
100.00%



static int fat_readpage(struct file *file, struct page *page)
{
	return mpage_readpage(page, fat_get_block);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hirofumi ogawa
hirofumi ogawa
13
54.17%
2
40.00%
pre-git
pre-git
11
45.83%
3
60.00%
Total
24
100.00%
5
100.00%



static int fat_readpages(struct file *file, struct address_space *mapping,
			 struct list_head *pages, unsigned nr_pages)
{
	return mpage_readpages(mapping, pages, nr_pages, fat_get_block);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hirofumi ogawa
hirofumi ogawa
36
100.00%
1
100.00%
Total
36
100.00%
1
100.00%



static void fat_write_failed(struct address_space *mapping, loff_t to)
{
	struct inode *inode = mapping->host;

	if (to > inode->i_size) {
		truncate_pagecache(inode, inode->i_size);
		fat_truncate_blocks(inode, inode->i_size);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
nick piggin
nick piggin
51
100.00%
1
100.00%
Total
51
100.00%
1
100.00%



static int fat_write_begin(struct file *file, struct address_space *mapping,
			loff_t pos, unsigned len, unsigned flags,
			struct page **pagep, void **fsdata)
{
	int err;

	*pagep = NULL;
	err = cont_write_begin(file, mapping, pos, len, flags,
				pagep, fsdata, fat_get_block,
				&MSDOS_I(mapping->host)->mmu_private);
	if (err < 0)
		fat_write_failed(mapping, pos + len);
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
nick piggin
nick piggin
58
62.37%
2
33.33%
hirofumi ogawa
hirofumi ogawa
26
27.96%
1
16.67%
pre-git
pre-git
8
8.60%
2
33.33%
christoph hellwig
christoph hellwig
1
1.08%
1
16.67%
Total
93
100.00%
6
100.00%



static int fat_write_end(struct file *file, struct address_space *mapping,
			loff_t pos, unsigned len, unsigned copied,
			struct page *pagep, void *fsdata)
{
	struct inode *inode = mapping->host;
	int err;
	err = generic_write_end(file, mapping, pos, len, copied, pagep, fsdata);
	if (err < len)
		fat_write_failed(mapping, pos + len);
	if (!(err < 0) && !(MSDOS_I(inode)->i_attrs & ATTR_ARCH)) {
		inode->i_mtime = inode->i_ctime = current_time(inode);
		MSDOS_I(inode)->i_attrs |= ATTR_ARCH;
		mark_inode_dirty(inode);
	}
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hirofumi ogawa
hirofumi ogawa
79
59.40%
1
25.00%
nick piggin
nick piggin
50
37.59%
2
50.00%
deepa dinamani
deepa dinamani
4
3.01%
1
25.00%
Total
133
100.00%
4
100.00%



static ssize_t fat_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
{
	struct file *file = iocb->ki_filp;
	struct address_space *mapping = file->f_mapping;
	struct inode *inode = mapping->host;
	size_t count = iov_iter_count(iter);
	loff_t offset = iocb->ki_pos;
	ssize_t ret;

	if (iov_iter_rw(iter) == WRITE) {
		/*
                 * FIXME: blockdev_direct_IO() doesn't use ->write_begin(),
                 * so we need to update the ->mmu_private to block boundary.
                 *
                 * But we must fill the remaining area or hole by nul for
                 * updating ->mmu_private.
                 *
                 * Return 0, and fallback to normal buffered write.
                 */
		loff_t size = offset + count;
		if (MSDOS_I(inode)->mmu_private < size)
			return 0;
	}

	/*
         * FAT need to use the DIO_LOCKING for avoiding the race
         * condition of fat_get_block() and ->truncate().
         */
	ret = blockdev_direct_IO(iocb, inode, iter, fat_get_block);
	if (ret < 0 && iov_iter_rw(iter) == WRITE)
		fat_write_failed(mapping, offset + count);

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hirofumi ogawa
hirofumi ogawa
69
51.88%
3
30.00%
nick piggin
nick piggin
34
25.56%
2
20.00%
al viro
al viro
13
9.77%
2
20.00%
omar sandoval
omar sandoval
9
6.77%
1
10.00%
christoph hellwig
christoph hellwig
8
6.02%
2
20.00%
Total
133
100.00%
10
100.00%



static int fat_get_block_bmap(struct inode *inode, sector_t iblock,
		struct buffer_head *bh_result, int create)
{
	struct super_block *sb = inode->i_sb;
	unsigned long max_blocks = bh_result->b_size >> inode->i_blkbits;
	int err;
	sector_t bmap;
	unsigned long mapped_blocks;

	BUG_ON(create != 0);

	err = fat_bmap(inode, iblock, &bmap, &mapped_blocks, create, true);
	if (err)
		return err;

	if (bmap) {
		map_bh(bh_result, sb, bmap);
		max_blocks = min(mapped_blocks, max_blocks);
	}

	bh_result->b_size = max_blocks << sb->s_blocksize_bits;

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
namjae jeon
namjae jeon
123
100.00%
1
100.00%
Total
123
100.00%
1
100.00%



static sector_t _fat_bmap(struct address_space *mapping, sector_t block)
{
	sector_t blocknr;

	/* fat_get_cluster() assumes the requested blocknr isn't truncated. */
	down_read(&MSDOS_I(mapping->host)->truncate_lock);
	blocknr = generic_block_bmap(mapping, block, fat_get_block_bmap);
	up_read(&MSDOS_I(mapping->host)->truncate_lock);

	return blocknr;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hirofumi ogawa
hirofumi ogawa
41
70.69%
3
37.50%
christoph hellwig
christoph hellwig
9
15.52%
2
25.00%
pre-git
pre-git
5
8.62%
1
12.50%
linus torvalds
linus torvalds
2
3.45%
1
12.50%
namjae jeon
namjae jeon
1
1.72%
1
12.50%
Total
58
100.00%
8
100.00%

/*
 * fat_block_truncate_page() zeroes out a mapping from file offset `from'
 * up to the end of the block which corresponds to `from'.
 * This is required during truncate to physically zeroout the tail end
 * of that block so it doesn't yield old data if the file is later grown.
 * Also, avoid causing failure from fsx for cases of "data past EOF"
 */


int fat_block_truncate_page(struct inode *inode, loff_t from)
{
	return block_truncate_page(inode->i_mapping, from, fat_get_block);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
namjae jeon
namjae jeon
25
100.00%
1
100.00%
Total
25
100.00%
1
100.00%


static const struct address_space_operations fat_aops = {
	.readpage	= fat_readpage,
	.readpages	= fat_readpages,
	.writepage	= fat_writepage,
	.writepages	= fat_writepages,
	.write_begin	= fat_write_begin,
	.write_end	= fat_write_end,
	.direct_IO	= fat_direct_IO,
	.bmap		= _fat_bmap
};

/*
 * New FAT inode stuff. We do the following:
 *      a) i_ino is constant and has nothing with on-disk location.
 *      b) FAT manages its own cache of directory entries.
 *      c) *This* cache is indexed by on-disk location.
 *      d) inode has an associated directory entry, all right, but
 *              it may be unhashed.
 *      e) currently entries are stored within struct inode. That should
 *              change.
 *      f) we deal with races in the following way:
 *              1. readdir() and lookup() do FAT-dir-cache lookup.
 *              2. rename() unhashes the F-d-c entry and rehashes it in
 *                      a new place.
 *              3. unlink() and rmdir() unhash F-d-c entry.
 *              4. fat_write_inode() checks whether the thing is unhashed.
 *                      If it is we silently return. If it isn't we do bread(),
 *                      check if the location is still valid and retry if it
 *                      isn't. Otherwise we do changes.
 *              5. Spinlock is used to protect hash/unhash/location check/lookup
 *              6. fat_evict_inode() unhashes the F-d-c entry.
 *              7. lookup() and readdir() do igrab() if they find a F-d-c entry
 *                      and consider negative result as cache miss.
 */



static void fat_hash_init(struct super_block *sb)
{
	struct msdos_sb_info *sbi = MSDOS_SB(sb);
	int i;

	spin_lock_init(&sbi->inode_hash_lock);
	for (i = 0; i < FAT_HASH_SIZE; i++)
		INIT_HLIST_HEAD(&sbi->inode_hashtable[i]);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hirofumi ogawa
hirofumi ogawa
46
82.14%
2
33.33%
pre-git
pre-git
7
12.50%
2
33.33%
linus torvalds
linus torvalds
2
3.57%
1
16.67%
christoph hellwig
christoph hellwig
1
1.79%
1
16.67%
Total
56
100.00%
6
100.00%



static inline unsigned long fat_hash(loff_t i_pos)
{
	return hash_32(i_pos, FAT_HASH_BITS);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hirofumi ogawa
hirofumi ogawa
19
100.00%
2
100.00%
Total
19
100.00%
2
100.00%



static void dir_hash_init(struct super_block *sb)
{
	struct msdos_sb_info *sbi = MSDOS_SB(sb);
	int i;

	spin_lock_init(&sbi->dir_hash_lock);
	for (i = 0; i < FAT_HASH_SIZE; i++)
		INIT_HLIST_HEAD(&sbi->dir_hashtable[i]);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
steven j. magnani
steven j. magnani
56
100.00%
1
100.00%
Total
56
100.00%
1
100.00%



void fat_attach(struct inode *inode, loff_t i_pos)
{
	struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);

	if (inode->i_ino != MSDOS_ROOT_INO) {
		struct hlist_head *head =   sbi->inode_hashtable
					  + fat_hash(i_pos);

		spin_lock(&sbi->inode_hash_lock);
		MSDOS_I(inode)->i_pos = i_pos;
		hlist_add_head(&MSDOS_I(inode)->i_fat_hash, head);
		spin_unlock(&sbi->inode_hash_lock);
	}

	/* If NFS support is enabled, cache the mapping of start cluster
         * to directory inode. This is used during reconnection of
         * dentries to the filesystem root.
         */
	if (S_ISDIR(inode->i_mode) && sbi->options.nfs) {
		struct hlist_head *d_head = sbi->dir_hashtable;
		d_head += fat_dir_hash(MSDOS_I(inode)->i_logstart);

		spin_lock(&sbi->dir_hash_lock);
		hlist_add_head(&MSDOS_I(inode)->i_dir_hash, d_head);
		spin_unlock(&sbi->dir_hash_lock);
	}
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
steven j. magnani
steven j. magnani
78
50.32%
1
16.67%
hirofumi ogawa
hirofumi ogawa
52
33.55%
3
50.00%
pre-git
pre-git
25
16.13%
2
33.33%
Total
155
100.00%
6
100.00%


EXPORT_SYMBOL_GPL(fat_attach);



void fat_detach(struct inode *inode)
{
	struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);
	spin_lock(&sbi->inode_hash_lock);
	MSDOS_I(inode)->i_pos = 0;
	hlist_del_init(&MSDOS_I(inode)->i_fat_hash);
	spin_unlock(&sbi->inode_hash_lock);

	if (S_ISDIR(inode->i_mode) && sbi->options.nfs) {
		spin_lock(&sbi->dir_hash_lock);
		hlist_del_init(&MSDOS_I(inode)->i_dir_hash);
		spin_unlock(&sbi->dir_hash_lock);
	}
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
steven j. magnani
steven j. magnani
44
43.14%
1
16.67%
hirofumi ogawa
hirofumi ogawa
28
27.45%
2
33.33%
pre-git
pre-git
23
22.55%
2
33.33%
brian gerst
brian gerst
7
6.86%
1
16.67%
Total
102
100.00%
6
100.00%


EXPORT_SYMBOL_GPL(fat_detach);



struct inode *fat_iget(struct super_block *sb, loff_t i_pos)
{
	struct msdos_sb_info *sbi = MSDOS_SB(sb);
	struct hlist_head *head = sbi->inode_hashtable + fat_hash(i_pos);
	struct msdos_inode_info *i;
	struct inode *inode = NULL;

	spin_lock(&sbi->inode_hash_lock);
	hlist_for_each_entry(i, head, i_fat_hash) {
		BUG_ON(i->vfs_inode.i_sb != sb);
		if (i->i_pos != i_pos)
			continue;
		inode = igrab(&i->vfs_inode);
		if (inode)
			break;
	}
	spin_unlock(&sbi->inode_hash_lock);
	return inode;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hirofumi ogawa
hirofumi ogawa
114
99.13%
4
80.00%
linus torvalds
linus torvalds
1
0.87%
1
20.00%
Total
115
100.00%
5
100.00%



static int is_exec(unsigned char *extension)
{
	unsigned char exe_extensions[] = "EXECOMBAT", *walk;

	for (walk = exe_extensions; *walk; walk += 3)
		if (!strncmp(extension, walk, 3))
			return 1;
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hirofumi ogawa
hirofumi ogawa
48
92.31%
2
50.00%
linus torvalds
linus torvalds
3
5.77%
1
25.00%
manuel scholling
manuel scholling
1
1.92%
1
25.00%
Total
52
100.00%
4
100.00%



static int fat_calc_dir_size(struct inode *inode)
{
	struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);
	int ret, fclus, dclus;

	inode->i_size = 0;
	if (MSDOS_I(inode)->i_start == 0)
		return 0;

	ret = fat_get_cluster(inode, FAT_ENT_EOF, &fclus, &dclus);
	if (ret < 0)
		return ret;
	inode->i_size = (fclus + 1) << sbi->cluster_bits;

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hirofumi ogawa
hirofumi ogawa
91
100.00%
2
100.00%
Total
91
100.00%
2
100.00%



static int fat_validate_dir(struct inode *dir)
{
	struct super_block *sb = dir->i_sb;

	if (dir->i_nlink < 2) {
		/* Directory should have "."/".." entries at least. */
		fat_fs_error(sb, "corrupted directory (invalid entries)");
		return -EIO;
	}
	if (MSDOS_I(dir)->i_start == 0 ||
	    MSDOS_I(dir)->i_start == MSDOS_SB(sb)->root_cluster) {
		/* Directory should point valid cluster. */
		fat_fs_error(sb, "corrupted directory (invalid i_start)");
		return -EIO;
	}
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hirofumi ogawa
hirofumi ogawa
84
100.00%
1
100.00%
Total
84
100.00%
1
100.00%

/* doesn't deal with root inode */


int fat_fill_inode(struct inode *inode, struct msdos_dir_entry *de)
{
	struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);
	int error;

	MSDOS_I(inode)->i_pos = 0;
	inode->i_uid = sbi->options.fs_uid;
	inode->i_gid = sbi->options.fs_gid;
	inode->i_version++;
	inode->i_generation = get_seconds();

	if ((de->attr & ATTR_DIR) && !IS_FREE(de->name)) {
		inode->i_generation &= ~1;
		inode->i_mode = fat_make_mode(sbi, de->attr, S_IRWXUGO);
		inode->i_op = sbi->dir_ops;
		inode->i_fop = &fat_dir_operations;

		MSDOS_I(inode)->i_start = fat_get_start(sbi, de);
		MSDOS_I(inode)->i_logstart = MSDOS_I(inode)->i_start;
		error = fat_calc_dir_size(inode);
		if (error < 0)
			return error;
		MSDOS_I(inode)->mmu_private = inode->i_size;

		set_nlink(inode, fat_subdirs(inode));

		error = fat_validate_dir(inode);
		if (error < 0)
			return error;
	} else { /* not a directory */
		inode->i_generation |= 1;
		inode->i_mode = fat_make_mode(sbi, de->attr,
			((sbi->options.showexec && !is_exec(de->name + 8))
			 ? S_IRUGO|S_IWUGO : S_IRWXUGO));
		MSDOS_I(inode)->i_start = fat_get_start(sbi, de);

		MSDOS_I(inode)->i_logstart = MSDOS_I(inode)->i_start;
		inode->i_size = le32_to_cpu(de->size);
		inode->i_op = &fat_file_inode_operations;
		inode->i_fop = &fat_file_operations;
		inode->i_mapping->a_ops = &fat_aops;
		MSDOS_I(inode)->mmu_private = inode->i_size;
	}
	if (de->attr & ATTR_SYS) {
		if (sbi->options.sys_immutable)
			inode->i_flags |= S_IMMUTABLE;
	}
	fat_save_attrs(inode, de->attr);

	inode->i_blocks = ((inode->i_size + (sbi->cluster_size - 1))
			   & ~((loff_t)sbi->cluster_size - 1)) >> 9;

	fat_time_fat2unix(sbi, &inode->i_mtime, de->time, de->date, 0);
	if (sbi->options.isvfat) {
		fat_time_fat2unix(sbi, &inode->i_ctime, de->ctime,
				  de->cdate, de->ctime_cs);
		fat_time_fat2unix(sbi, &inode->i_atime, 0, de->adate, 0);
	} else
		inode->i_ctime = inode->i_atime = inode->i_mtime;

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hirofumi ogawa
hirofumi ogawa
456
94.21%
7
58.33%
stephane kardas
stephane kardas
14
2.89%
1
8.33%
steven j. magnani
steven j. magnani
4
0.83%
1
8.33%
joe peterson
joe peterson
4
0.83%
1
8.33%
miklos szeredi
miklos szeredi
4
0.83%
1
8.33%
andrew morton
andrew morton
2
0.41%
1
8.33%
Total
484
100.00%
12
100.00%



static inline void fat_lock_build_inode(struct msdos_sb_info *sbi)
{
	if (sbi->options.nfs == FAT_NFS_NOSTALE_RO)
		mutex_lock(&sbi->nfs_build_inode_lock);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
namjae jeon
namjae jeon
30
100.00%
1
100.00%
Total
30
100.00%
1
100.00%



static inline void fat_unlock_build_inode(struct msdos_sb_info *sbi)
{
	if (sbi->options.nfs == FAT_NFS_NOSTALE_RO)
		mutex_unlock(&sbi->nfs_build_inode_lock);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
namjae jeon
namjae jeon
30
100.00%
1
100.00%
Total
30
100.00%
1
100.00%



struct inode *fat_build_inode(struct super_block *sb,
			struct msdos_dir_entry *de, loff_t i_pos)
{
	struct inode *inode;
	int err;

	fat_lock_build_inode(MSDOS_SB(sb));
	inode = fat_iget(sb, i_pos);
	if (inode)
		goto out;
	inode = new_inode(sb);
	if (!inode) {
		inode = ERR_PTR(-ENOMEM);
		goto out;
	}
	inode->i_ino = iunique(sb, MSDOS_ROOT_INO);
	inode->i_version = 1;
	err = fat_fill_inode(inode, de);
	if (err) {
		iput(inode);
		inode = ERR_PTR(err);
		goto out;
	}
	fat_attach(inode, i_pos);
	insert_inode_hash(inode);
out:
	fat_unlock_build_inode(MSDOS_SB(sb));
	return inode;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
hirofumi ogawa
hirofumi ogawa
133
89.26%
3
75.00%
namjae jeon
namjae jeon
16
10.74%
1
25.00%
Total
149
100.00%
4
100.00%


EXPORT_SYMBOL_GPL(fat_build_inode);

static int __fat_write_inode(struct inode *