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udf: Move handling of uniqueID into a helper function and protect it by a s_alloc_mutex

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uniqueID handling has been duplicated in three places. Move it into a common
helper. Since we modify an LVID buffer with uniqueID update, we take
sbi->s_alloc_mutex to protect agaist other modifications of the structure.

Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara
2010-10-20 18:28:46 +02:00
parent 49521de119
commit d664b6af60
4 changed files with 47 additions and 53 deletions
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51
fs/udf/namei.c
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@@ -890,8 +890,8 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry,
int block;
unsigned char *name = NULL;
int namelen;
struct buffer_head *bh;
struct udf_inode_info *iinfo;
struct super_block *sb = dir->i_sb;
lock_kernel();
inode = udf_new_inode(dir, S_IFLNK | S_IRWXUGO, &err);
@@ -912,7 +912,7 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry,
struct kernel_lb_addr eloc;
uint32_t bsize;
block = udf_new_block(inode->i_sb, inode,
block = udf_new_block(sb, inode,
iinfo->i_location.partitionReferenceNum,
iinfo->i_location.logicalBlockNum, &err);
if (!block)
@@ -923,17 +923,17 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry,
eloc.logicalBlockNum = block;
eloc.partitionReferenceNum =
iinfo->i_location.partitionReferenceNum;
bsize = inode->i_sb->s_blocksize;
bsize = sb->s_blocksize;
iinfo->i_lenExtents = bsize;
udf_add_aext(inode, &epos, &eloc, bsize, 0);
brelse(epos.bh);
block = udf_get_pblock(inode->i_sb, block,
block = udf_get_pblock(sb, block,
iinfo->i_location.partitionReferenceNum,
0);
epos.bh = udf_tgetblk(inode->i_sb, block);
epos.bh = udf_tgetblk(sb, block);
lock_buffer(epos.bh);
memset(epos.bh->b_data, 0x00, inode->i_sb->s_blocksize);
memset(epos.bh->b_data, 0x00, bsize);
set_buffer_uptodate(epos.bh);
unlock_buffer(epos.bh);
mark_buffer_dirty_inode(epos.bh, inode);
@@ -941,7 +941,7 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry,
} else
ea = iinfo->i_ext.i_data + iinfo->i_lenEAttr;
eoffset = inode->i_sb->s_blocksize - udf_ext0_offset(inode);
eoffset = sb->s_blocksize - udf_ext0_offset(inode);
pc = (struct pathComponent *)ea;
if (*symname == '/') {
@@ -981,7 +981,7 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry,
}
if (pc->componentType == 5) {
namelen = udf_put_filename(inode->i_sb, compstart, name,
namelen = udf_put_filename(sb, compstart, name,
symname - compstart);
if (!namelen)
goto out_no_entry;
@@ -1015,23 +1015,11 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry,
fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
if (!fi)
goto out_no_entry;
cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
cfi.icb.extLength = cpu_to_le32(sb->s_blocksize);
cfi.icb.extLocation = cpu_to_lelb(iinfo->i_location);
bh = UDF_SB(inode->i_sb)->s_lvid_bh;
if (bh) {
struct logicalVolIntegrityDesc *lvid =
(struct logicalVolIntegrityDesc *)bh->b_data;
struct logicalVolHeaderDesc *lvhd;
uint64_t uniqueID;
lvhd = (struct logicalVolHeaderDesc *)
lvid->logicalVolContentsUse;
uniqueID = le64_to_cpu(lvhd->uniqueID);
if (UDF_SB(inode->i_sb)->s_lvid_bh) {
*(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL);
if (!(++uniqueID & 0x00000000FFFFFFFFUL))
uniqueID += 16;
lvhd->uniqueID = cpu_to_le64(uniqueID);
mark_buffer_dirty(bh);
cpu_to_le32(lvid_get_unique_id(sb));
}
udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
@@ -1060,7 +1048,6 @@ static int udf_link(struct dentry *old_dentry, struct inode *dir,
struct udf_fileident_bh fibh;
struct fileIdentDesc cfi, *fi;
int err;
struct buffer_head *bh;
lock_kernel();
if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) {
@@ -1075,21 +1062,9 @@ static int udf_link(struct dentry *old_dentry, struct inode *dir,
}
cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
cfi.icb.extLocation = cpu_to_lelb(UDF_I(inode)->i_location);
bh = UDF_SB(inode->i_sb)->s_lvid_bh;
if (bh) {
struct logicalVolIntegrityDesc *lvid =
(struct logicalVolIntegrityDesc *)bh->b_data;
struct logicalVolHeaderDesc *lvhd;
uint64_t uniqueID;
lvhd = (struct logicalVolHeaderDesc *)
(lvid->logicalVolContentsUse);
uniqueID = le64_to_cpu(lvhd->uniqueID);
if (UDF_SB(inode->i_sb)->s_lvid_bh) {
*(__le32 *)((struct allocDescImpUse *)cfi.icb.impUse)->impUse =
cpu_to_le32(uniqueID & 0x00000000FFFFFFFFUL);
if (!(++uniqueID & 0x00000000FFFFFFFFUL))
uniqueID += 16;
lvhd->uniqueID = cpu_to_le64(uniqueID);
mark_buffer_dirty(bh);
cpu_to_le32(lvid_get_unique_id(inode->i_sb));
}
udf_write_fi(dir, &cfi, fi, &fibh, NULL, NULL);
if (UDF_I(dir)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)