#include <linux/pagemap.h>
#include <linux/mpage.h>
#include <linux/buffer_head.h>
+#include <linux/exportfs.h>
#include <linux/mount.h>
#include <linux/vfs.h>
#include <linux/parser.h>
#include <linux/uio.h>
#include <linux/writeback.h>
+#include <linux/log2.h>
#include <asm/unaligned.h>
#ifndef CONFIG_FAT_DEFAULT_IOCHARSET
return mpage_readpages(mapping, pages, nr_pages, fat_get_block);
}
-static int fat_prepare_write(struct file *file, struct page *page,
- unsigned from, unsigned to)
+static int fat_write_begin(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned flags,
+ struct page **pagep, void **fsdata)
{
- return cont_prepare_write(page, from, to, fat_get_block,
- &MSDOS_I(page->mapping->host)->mmu_private);
+ *pagep = NULL;
+ return cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
+ fat_get_block,
+ &MSDOS_I(mapping->host)->mmu_private);
}
-static int fat_commit_write(struct file *file, struct page *page,
- unsigned from, unsigned to)
+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 = page->mapping->host;
- int err = generic_commit_write(file, page, from, to);
- if (!err && !(MSDOS_I(inode)->i_attrs & ATTR_ARCH)) {
+ struct inode *inode = mapping->host;
+ int err;
+ err = generic_write_end(file, mapping, pos, len, copied, pagep, fsdata);
+ if (!(err < 0) && !(MSDOS_I(inode)->i_attrs & ATTR_ARCH)) {
inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
MSDOS_I(inode)->i_attrs |= ATTR_ARCH;
mark_inode_dirty(inode);
.writepage = fat_writepage,
.writepages = fat_writepages,
.sync_page = block_sync_page,
- .prepare_write = fat_prepare_write,
- .commit_write = fat_commit_write,
+ .write_begin = fat_write_begin,
+ .write_end = fat_write_end,
.direct_IO = fat_direct_IO,
.bmap = _fat_bmap
};
} else { /* not a directory */
inode->i_generation |= 1;
inode->i_mode = MSDOS_MKMODE(de->attr,
- ((sbi->options.showexec &&
- !is_exec(de->ext))
+ ((sbi->options.showexec && !is_exec(de->name + 8))
? S_IRUGO|S_IWUGO : S_IRWXUGO)
& ~sbi->options.fs_fmask) | S_IFREG;
MSDOS_I(inode)->i_start = le16_to_cpu(de->start);
inode->i_blocks = ((inode->i_size + (sbi->cluster_size - 1))
& ~((loff_t)sbi->cluster_size - 1)) >> 9;
inode->i_mtime.tv_sec =
- date_dos2unix(le16_to_cpu(de->time), le16_to_cpu(de->date));
+ date_dos2unix(le16_to_cpu(de->time), le16_to_cpu(de->date),
+ sbi->options.tz_utc);
inode->i_mtime.tv_nsec = 0;
if (sbi->options.isvfat) {
int secs = de->ctime_cs / 100;
int csecs = de->ctime_cs % 100;
inode->i_ctime.tv_sec =
date_dos2unix(le16_to_cpu(de->ctime),
- le16_to_cpu(de->cdate)) + secs;
+ le16_to_cpu(de->cdate),
+ sbi->options.tz_utc) + secs;
inode->i_ctime.tv_nsec = csecs * 10000000;
inode->i_atime.tv_sec =
- date_dos2unix(0, le16_to_cpu(de->adate));
+ date_dos2unix(0, le16_to_cpu(de->adate),
+ sbi->options.tz_utc);
inode->i_atime.tv_nsec = 0;
} else
inode->i_ctime = inode->i_atime = inode->i_mtime;
static void fat_delete_inode(struct inode *inode)
{
truncate_inode_pages(&inode->i_data, 0);
-
- if (!is_bad_inode(inode)) {
- inode->i_size = 0;
- fat_truncate(inode);
- }
+ inode->i_size = 0;
+ fat_truncate(inode);
clear_inode(inode);
}
static void fat_clear_inode(struct inode *inode)
{
- struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);
+ struct super_block *sb = inode->i_sb;
+ struct msdos_sb_info *sbi = MSDOS_SB(sb);
- if (is_bad_inode(inode))
- return;
- lock_kernel();
spin_lock(&sbi->inode_hash_lock);
fat_cache_inval_inode(inode);
hlist_del_init(&MSDOS_I(inode)->i_fat_hash);
spin_unlock(&sbi->inode_hash_lock);
- unlock_kernel();
}
static void fat_write_super(struct super_block *sb)
static struct inode *fat_alloc_inode(struct super_block *sb)
{
struct msdos_inode_info *ei;
- ei = kmem_cache_alloc(fat_inode_cachep, GFP_KERNEL);
+ ei = kmem_cache_alloc(fat_inode_cachep, GFP_NOFS);
if (!ei)
return NULL;
return &ei->vfs_inode;
kmem_cache_free(fat_inode_cachep, MSDOS_I(inode));
}
-static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags)
+static void init_once(void *foo)
{
struct msdos_inode_info *ei = (struct msdos_inode_info *)foo;
- if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
- SLAB_CTOR_CONSTRUCTOR) {
- spin_lock_init(&ei->cache_lru_lock);
- ei->nr_caches = 0;
- ei->cache_valid_id = FAT_CACHE_VALID + 1;
- INIT_LIST_HEAD(&ei->cache_lru);
- INIT_HLIST_NODE(&ei->i_fat_hash);
- inode_init_once(&ei->vfs_inode);
- }
+ spin_lock_init(&ei->cache_lru_lock);
+ ei->nr_caches = 0;
+ ei->cache_valid_id = FAT_CACHE_VALID + 1;
+ INIT_LIST_HEAD(&ei->cache_lru);
+ INIT_HLIST_NODE(&ei->i_fat_hash);
+ inode_init_once(&ei->vfs_inode);
}
static int __init fat_init_inodecache(void)
sizeof(struct msdos_inode_info),
0, (SLAB_RECLAIM_ACCOUNT|
SLAB_MEM_SPREAD),
- init_once, NULL);
+ init_once);
if (fat_inode_cachep == NULL)
return -ENOMEM;
return 0;
struct msdos_sb_info *sbi = MSDOS_SB(dentry->d_sb);
/* If the count of free cluster is still unknown, counts it here. */
- if (sbi->free_clusters == -1) {
+ if (sbi->free_clusters == -1 || !sbi->free_clus_valid) {
int err = fat_count_free_clusters(dentry->d_sb);
if (err)
return err;
if (inode->i_ino == MSDOS_ROOT_INO || !i_pos)
return 0;
- lock_kernel();
+ lock_super(sb);
bh = sb_bread(sb, i_pos >> sbi->dir_per_block_bits);
if (!bh) {
printk(KERN_ERR "FAT: unable to read inode block "
if (i_pos != MSDOS_I(inode)->i_pos) {
spin_unlock(&sbi->inode_hash_lock);
brelse(bh);
- unlock_kernel();
+ unlock_super(sb);
goto retry;
}
raw_entry->attr = fat_attr(inode);
raw_entry->start = cpu_to_le16(MSDOS_I(inode)->i_logstart);
raw_entry->starthi = cpu_to_le16(MSDOS_I(inode)->i_logstart >> 16);
- fat_date_unix2dos(inode->i_mtime.tv_sec, &raw_entry->time, &raw_entry->date);
+ fat_date_unix2dos(inode->i_mtime.tv_sec, &raw_entry->time,
+ &raw_entry->date, sbi->options.tz_utc);
if (sbi->options.isvfat) {
__le16 atime;
- fat_date_unix2dos(inode->i_ctime.tv_sec,&raw_entry->ctime,&raw_entry->cdate);
- fat_date_unix2dos(inode->i_atime.tv_sec,&atime,&raw_entry->adate);
+ fat_date_unix2dos(inode->i_ctime.tv_sec, &raw_entry->ctime,
+ &raw_entry->cdate, sbi->options.tz_utc);
+ fat_date_unix2dos(inode->i_atime.tv_sec, &atime,
+ &raw_entry->adate, sbi->options.tz_utc);
raw_entry->ctime_cs = (inode->i_ctime.tv_sec & 1) * 100 +
inode->i_ctime.tv_nsec / 10000000;
}
err = sync_dirty_buffer(bh);
brelse(bh);
out:
- unlock_kernel();
+ unlock_super(sb);
return err;
}
.clear_inode = fat_clear_inode,
.remount_fs = fat_remount,
- .read_inode = make_bad_inode,
-
.show_options = fat_show_options,
};
* of i_logstart is used to store the directory entry offset.
*/
-static struct dentry *
-fat_decode_fh(struct super_block *sb, __u32 *fh, int len, int fhtype,
- int (*acceptable)(void *context, struct dentry *de),
- void *context)
-{
- if (fhtype != 3)
- return ERR_PTR(-ESTALE);
- if (len < 5)
- return ERR_PTR(-ESTALE);
-
- return sb->s_export_op->find_exported_dentry(sb, fh, NULL, acceptable, context);
-}
-
-static struct dentry *fat_get_dentry(struct super_block *sb, void *inump)
+static struct dentry *fat_fh_to_dentry(struct super_block *sb,
+ struct fid *fid, int fh_len, int fh_type)
{
struct inode *inode = NULL;
struct dentry *result;
- __u32 *fh = inump;
+ u32 *fh = fid->raw;
+
+ if (fh_len < 5 || fh_type != 3)
+ return NULL;
- inode = iget(sb, fh[0]);
- if (!inode || is_bad_inode(inode) || inode->i_generation != fh[1]) {
+ inode = ilookup(sb, fh[0]);
+ if (!inode || inode->i_generation != fh[1]) {
if (inode)
iput(inode);
inode = NULL;
static struct dentry *fat_get_parent(struct dentry *child)
{
+ struct super_block *sb = child->d_sb;
struct buffer_head *bh;
struct msdos_dir_entry *de;
loff_t i_pos;
struct inode *inode;
int err;
- lock_kernel();
+ lock_super(sb);
err = fat_get_dotdot_entry(child->d_inode, &bh, &de, &i_pos);
if (err) {
parent = ERR_PTR(err);
goto out;
}
- inode = fat_build_inode(child->d_sb, de, i_pos);
+ inode = fat_build_inode(sb, de, i_pos);
brelse(bh);
if (IS_ERR(inode)) {
- parent = ERR_PTR(PTR_ERR(inode));
+ parent = ERR_CAST(inode);
goto out;
}
parent = d_alloc_anon(inode);
parent = ERR_PTR(-ENOMEM);
}
out:
- unlock_kernel();
+ unlock_super(sb);
return parent;
}
-static struct export_operations fat_export_ops = {
- .decode_fh = fat_decode_fh,
+static const struct export_operations fat_export_ops = {
.encode_fh = fat_encode_fh,
- .get_dentry = fat_get_dentry,
+ .fh_to_dentry = fat_fh_to_dentry,
.get_parent = fat_get_parent,
};
seq_printf(m, ",gid=%u", opts->fs_gid);
seq_printf(m, ",fmask=%04o", opts->fs_fmask);
seq_printf(m, ",dmask=%04o", opts->fs_dmask);
+ if (opts->allow_utime)
+ seq_printf(m, ",allow_utime=%04o", opts->allow_utime);
if (sbi->nls_disk)
seq_printf(m, ",codepage=%s", sbi->nls_disk->charset);
if (isvfat) {
}
if (opts->name_check != 'n')
seq_printf(m, ",check=%c", opts->name_check);
+ if (opts->usefree)
+ seq_puts(m, ",usefree");
if (opts->quiet)
seq_puts(m, ",quiet");
if (opts->showexec)
if (!opts->numtail)
seq_puts(m, ",nonumtail");
}
+ if (sbi->options.flush)
+ seq_puts(m, ",flush");
+ if (opts->tz_utc)
+ seq_puts(m, ",tz=UTC");
return 0;
}
enum {
Opt_check_n, Opt_check_r, Opt_check_s, Opt_uid, Opt_gid,
- Opt_umask, Opt_dmask, Opt_fmask, Opt_codepage, Opt_nocase,
- Opt_quiet, Opt_showexec, Opt_debug, Opt_immutable,
- Opt_dots, Opt_nodots,
+ Opt_umask, Opt_dmask, Opt_fmask, Opt_allow_utime, Opt_codepage,
+ Opt_usefree, Opt_nocase, Opt_quiet, Opt_showexec, Opt_debug,
+ Opt_immutable, Opt_dots, Opt_nodots,
Opt_charset, Opt_shortname_lower, Opt_shortname_win95,
Opt_shortname_winnt, Opt_shortname_mixed, Opt_utf8_no, Opt_utf8_yes,
Opt_uni_xl_no, Opt_uni_xl_yes, Opt_nonumtail_no, Opt_nonumtail_yes,
- Opt_obsolate, Opt_flush, Opt_err,
+ Opt_obsolate, Opt_flush, Opt_tz_utc, Opt_err,
};
static match_table_t fat_tokens = {
{Opt_umask, "umask=%o"},
{Opt_dmask, "dmask=%o"},
{Opt_fmask, "fmask=%o"},
+ {Opt_allow_utime, "allow_utime=%o"},
{Opt_codepage, "codepage=%u"},
+ {Opt_usefree, "usefree"},
{Opt_nocase, "nocase"},
{Opt_quiet, "quiet"},
{Opt_showexec, "showexec"},
{Opt_obsolate, "cvf_options=%100s"},
{Opt_obsolate, "posix"},
{Opt_flush, "flush"},
+ {Opt_tz_utc, "tz=UTC"},
{Opt_err, NULL},
};
static match_table_t msdos_tokens = {
opts->fs_uid = current->uid;
opts->fs_gid = current->gid;
opts->fs_fmask = opts->fs_dmask = current->fs->umask;
+ opts->allow_utime = -1;
opts->codepage = fat_default_codepage;
opts->iocharset = fat_default_iocharset;
if (is_vfat)
opts->quiet = opts->showexec = opts->sys_immutable = opts->dotsOK = 0;
opts->utf8 = opts->unicode_xlate = 0;
opts->numtail = 1;
- opts->nocase = 0;
+ opts->usefree = opts->nocase = 0;
+ opts->tz_utc = 0;
*debug = 0;
if (!options)
- return 0;
+ goto out;
while ((p = strsep(&options, ",")) != NULL) {
int token;
case Opt_check_n:
opts->name_check = 'n';
break;
+ case Opt_usefree:
+ opts->usefree = 1;
+ break;
case Opt_nocase:
if (!is_vfat)
opts->nocase = 1;
return 0;
opts->fs_fmask = option;
break;
+ case Opt_allow_utime:
+ if (match_octal(&args[0], &option))
+ return 0;
+ opts->allow_utime = option & (S_IWGRP | S_IWOTH);
+ break;
case Opt_codepage:
if (match_int(&args[0], &option))
return 0;
case Opt_flush:
opts->flush = 1;
break;
+ case Opt_tz_utc:
+ opts->tz_utc = 1;
+ break;
/* msdos specific */
case Opt_dots:
return -EINVAL;
}
}
+
+out:
/* UTF-8 doesn't provide FAT semantics */
if (!strcmp(opts->iocharset, "utf8")) {
printk(KERN_ERR "FAT: utf8 is not a recommended IO charset"
- " for FAT filesystems, filesystem will be case sensitive!\n");
+ " for FAT filesystems, filesystem will be "
+ "case sensitive!\n");
}
+ /* If user doesn't specify allow_utime, it's initialized from dmask. */
+ if (opts->allow_utime == (unsigned short)-1)
+ opts->allow_utime = ~opts->fs_dmask & (S_IWGRP | S_IWOTH);
if (opts->unicode_xlate)
opts->utf8 = 0;
long error;
char buf[50];
+ /*
+ * GFP_KERNEL is ok here, because while we do hold the
+ * supeblock lock, memory pressure can't call back into
+ * the filesystem, since we're only just about to mount
+ * it and have no inodes etc active!
+ */
sbi = kzalloc(sizeof(struct msdos_sb_info), GFP_KERNEL);
if (!sbi)
return -ENOMEM;
*/
media = b->media;
- if (!FAT_VALID_MEDIA(media)) {
+ if (!fat_valid_media(media)) {
if (!silent)
printk(KERN_ERR "FAT: invalid media value (0x%02x)\n",
media);
brelse(bh);
goto out_invalid;
}
- logical_sector_size =
- le16_to_cpu(get_unaligned((__le16 *)&b->sector_size));
- if (!logical_sector_size
- || (logical_sector_size & (logical_sector_size - 1))
+ logical_sector_size = get_unaligned_le16(&b->sector_size);
+ if (!is_power_of_2(logical_sector_size)
|| (logical_sector_size < 512)
- || (PAGE_CACHE_SIZE < logical_sector_size)) {
+ || (logical_sector_size > 4096)) {
if (!silent)
printk(KERN_ERR "FAT: bogus logical sector size %u\n",
logical_sector_size);
goto out_invalid;
}
sbi->sec_per_clus = b->sec_per_clus;
- if (!sbi->sec_per_clus
- || (sbi->sec_per_clus & (sbi->sec_per_clus - 1))) {
+ if (!is_power_of_2(sbi->sec_per_clus)) {
if (!silent)
printk(KERN_ERR "FAT: bogus sectors per cluster %u\n",
sbi->sec_per_clus);
sbi->fat_length = le16_to_cpu(b->fat_length);
sbi->root_cluster = 0;
sbi->free_clusters = -1; /* Don't know yet */
+ sbi->free_clus_valid = 0;
sbi->prev_free = FAT_START_ENT;
if (!sbi->fat_length && b->fat32_length) {
fsinfo = (struct fat_boot_fsinfo *)fsinfo_bh->b_data;
if (!IS_FSINFO(fsinfo)) {
- printk(KERN_WARNING
- "FAT: Did not find valid FSINFO signature.\n"
- " Found signature1 0x%08x signature2 0x%08x"
- " (sector = %lu)\n",
+ printk(KERN_WARNING "FAT: Invalid FSINFO signature: "
+ "0x%08x, 0x%08x (sector = %lu)\n",
le32_to_cpu(fsinfo->signature1),
le32_to_cpu(fsinfo->signature2),
sbi->fsinfo_sector);
} else {
+ if (sbi->options.usefree)
+ sbi->free_clus_valid = 1;
sbi->free_clusters = le32_to_cpu(fsinfo->free_clusters);
sbi->prev_free = le32_to_cpu(fsinfo->next_cluster);
}
sbi->dir_per_block_bits = ffs(sbi->dir_per_block) - 1;
sbi->dir_start = sbi->fat_start + sbi->fats * sbi->fat_length;
- sbi->dir_entries =
- le16_to_cpu(get_unaligned((__le16 *)&b->dir_entries));
+ sbi->dir_entries = get_unaligned_le16(&b->dir_entries);
if (sbi->dir_entries & (sbi->dir_per_block - 1)) {
if (!silent)
printk(KERN_ERR "FAT: bogus directroy-entries per block"
rootdir_sectors = sbi->dir_entries
* sizeof(struct msdos_dir_entry) / sb->s_blocksize;
sbi->data_start = sbi->dir_start + rootdir_sectors;
- total_sectors = le16_to_cpu(get_unaligned((__le16 *)&b->sectors));
+ total_sectors = get_unaligned_le16(&b->sectors);
if (total_sectors == 0)
total_sectors = le32_to_cpu(b->total_sect);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff