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2009-04-10 Vladimir Serbinenko <phcoder@gmail.com>

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UFS improvements

	* fs/ufs.c (INODE_NBLOCKS): new definition
	(struct grub_ufs_dirent): added fields for non-BSD dirents
	(grub_ufs_get_file_block): fixed double indirect handling
	(grub_ufs_lookup_symlink): use more robust way to determine whether
	symlink is inline
	(grub_ufs_find_file): support for non-BSD dirents
	(grub_ufs_dir): support for non-BSD dirents
This commit is contained in:
phcoder 2009-04-10 21:47:08 +00:00
parent e7e6862a4c
commit 6df8cc7614
2 changed files with 42 additions and 13 deletions
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12
ChangeLog
View file

@ -1,3 +1,15 @@
2009-04-10 Vladimir Serbinenko <phcoder@gmail.com>
UFS improvements
* fs/ufs.c (INODE_NBLOCKS): new definition
(struct grub_ufs_dirent): added fields for non-BSD dirents
(grub_ufs_get_file_block): fixed double indirect handling
(grub_ufs_lookup_symlink): use more robust way to determine whether
symlink is inline
(grub_ufs_find_file): support for non-BSD dirents
(grub_ufs_dir): support for non-BSD dirents
2009-04-10 Bean <bean123ch@gnail.com> 2009-04-10 Bean <bean123ch@gnail.com>
* include/grub/efi/api.h (grub_efi_configuration_table): Add packed * include/grub/efi/api.h (grub_efi_configuration_table): Add packed

43
fs/ufs.c
View file

@ -54,6 +54,8 @@
grub_le_to_cpu##bits1 (data->inode.field) : \ grub_le_to_cpu##bits1 (data->inode.field) : \
grub_le_to_cpu##bits2 (data->inode2.field)) grub_le_to_cpu##bits2 (data->inode2.field))
#define INODE_SIZE(data) INODE_ENDIAN (data,size,32,64) #define INODE_SIZE(data) INODE_ENDIAN (data,size,32,64)
#define INODE_NBLOCKS(data) INODE_ENDIAN (data,nblocks,32,64)
#define INODE_MODE(data) INODE_ENDIAN (data,mode,16,16) #define INODE_MODE(data) INODE_ENDIAN (data,mode,16,16)
#define INODE_BLKSZ(data) (data->ufs_type == UFS1 ? 4 : 8) #define INODE_BLKSZ(data) (data->ufs_type == UFS1 ? 4 : 8)
#define INODE_DIRBLOCKS(data,blk) INODE_ENDIAN \ #define INODE_DIRBLOCKS(data,blk) INODE_ENDIAN \
@ -174,8 +176,15 @@ struct grub_ufs_dirent
{ {
grub_uint32_t ino; grub_uint32_t ino;
grub_uint16_t direntlen; grub_uint16_t direntlen;
grub_uint8_t filetype; union
grub_uint8_t namelen; {
grub_uint16_t namelen;
struct
{
grub_uint8_t filetype_bsd;
grub_uint8_t namelen_bsd;
};
};
} __attribute__ ((packed)); } __attribute__ ((packed));
/* Information about a "mounted" ufs filesystem. */ /* Information about a "mounted" ufs filesystem. */
@ -234,15 +243,16 @@ grub_ufs_get_file_block (struct grub_ufs_data *data, unsigned int blk)
blk -= indirsz; blk -= indirsz;
/* Double indirect block. */ /* Double indirect block. */
if (blk < UFS_BLKSZ (sblock) / indirsz) if (blk < indirsz * indirsz)
{ {
grub_uint32_t indir[UFS_BLKSZ (sblock) >> 2]; grub_uint32_t indir[UFS_BLKSZ (sblock) >> 2];
grub_disk_read (data->disk, INODE_INDIRBLOCKS (data, 1) << log2_blksz, grub_disk_read (data->disk, INODE_INDIRBLOCKS (data, 1) << log2_blksz,
0, sizeof (indir), (char *) indir); 0, sizeof (indir), (char *) indir);
grub_disk_read (data->disk, grub_disk_read (data->disk,
(data->ufs_type == UFS1) ? ((data->ufs_type == UFS1) ?
indir[blk / indirsz] : indir [(blk / indirsz) << 1], indir[blk / indirsz] : indir [(blk / indirsz) << 1])
<< log2_blksz,
0, sizeof (indir), (char *) indir); 0, sizeof (indir), (char *) indir);
return (data->ufs_type == UFS1) ? return (data->ufs_type == UFS1) ?
@ -387,8 +397,7 @@ grub_ufs_lookup_symlink (struct grub_ufs_data *data, int ino)
if (++data->linknest > GRUB_UFS_MAX_SYMLNK_CNT) if (++data->linknest > GRUB_UFS_MAX_SYMLNK_CNT)
return grub_error (GRUB_ERR_SYMLINK_LOOP, "too deep nesting of symlinks"); return grub_error (GRUB_ERR_SYMLINK_LOOP, "too deep nesting of symlinks");
if (INODE_SIZE (data) < (GRUB_UFS_DIRBLKS + GRUB_UFS_INDIRBLKS if (INODE_NBLOCKS (data) == 0)
* INODE_BLKSZ (data)))
grub_strcpy (symlink, (char *) INODE (data, symlink)); grub_strcpy (symlink, (char *) INODE (data, symlink));
else else
{ {
@ -447,6 +456,7 @@ grub_ufs_find_file (struct grub_ufs_data *data, const char *path)
do do
{ {
struct grub_ufs_dirent dirent; struct grub_ufs_dirent dirent;
int namelen;
if (grub_strlen (name) == 0) if (grub_strlen (name) == 0)
return GRUB_ERR_NONE; return GRUB_ERR_NONE;
@ -454,15 +464,18 @@ grub_ufs_find_file (struct grub_ufs_data *data, const char *path)
if (grub_ufs_read_file (data, 0, pos, sizeof (dirent), if (grub_ufs_read_file (data, 0, pos, sizeof (dirent),
(char *) &dirent) < 0) (char *) &dirent) < 0)
return grub_errno; return grub_errno;
namelen = (data->ufs_type == UFS2)
? dirent.namelen_bsd : grub_le_to_cpu16 (dirent.namelen);
{ {
char filename[dirent.namelen + 1]; char filename[namelen + 1];
if (grub_ufs_read_file (data, 0, pos + sizeof (dirent), if (grub_ufs_read_file (data, 0, pos + sizeof (dirent),
dirent.namelen, filename) < 0) namelen, filename) < 0)
return grub_errno; return grub_errno;
filename[dirent.namelen] = '\0'; filename[namelen] = '\0';
if (!grub_strcmp (name, filename)) if (!grub_strcmp (name, filename))
{ {
@ -595,21 +608,25 @@ grub_ufs_dir (grub_device_t device, const char *path,
while (pos < INODE_SIZE (data)) while (pos < INODE_SIZE (data))
{ {
struct grub_ufs_dirent dirent; struct grub_ufs_dirent dirent;
int namelen;
if (grub_ufs_read_file (data, 0, pos, sizeof (dirent), if (grub_ufs_read_file (data, 0, pos, sizeof (dirent),
(char *) &dirent) < 0) (char *) &dirent) < 0)
break; break;
namelen = (data->ufs_type == UFS2)
? dirent.namelen_bsd : grub_le_to_cpu16 (dirent.namelen);
{ {
char filename[dirent.namelen + 1]; char filename[namelen + 1];
struct grub_dirhook_info info; struct grub_dirhook_info info;
grub_memset (&info, 0, sizeof (info)); grub_memset (&info, 0, sizeof (info));
if (grub_ufs_read_file (data, 0, pos + sizeof (dirent), if (grub_ufs_read_file (data, 0, pos + sizeof (dirent),
dirent.namelen, filename) < 0) namelen, filename) < 0)
break; break;
filename[dirent.namelen] = '\0'; filename[namelen] = '\0';
if (data->ufs_type == UFS1) if (data->ufs_type == UFS1)
{ {
struct grub_ufs_inode inode; struct grub_ufs_inode inode;