Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull UFS fixes from Al Viro:
"This is just the obvious backport fodder; I'm pretty sure that there
will be more - definitely so wrt performance and quite possibly
correctness as well"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
ufs: we need to sync inode before freeing it
excessive checks in ufs_write_failed() and ufs_evict_inode()
ufs_getfrag_block(): we only grab ->truncate_mutex on block creation path
ufs_extend_tail(): fix the braino in calling conventions of ufs_new_fragments()
ufs: set correct ->s_maxsize
ufs: restore maintaining ->i_blocks
fix ufs_isblockset()
ufs: restore proper tail allocation
diff --git a/fs/stat.c b/fs/stat.c
index f494b18..c356108 100644
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -672,6 +672,7 @@
inode->i_bytes -= 512;
}
}
+EXPORT_SYMBOL(__inode_add_bytes);
void inode_add_bytes(struct inode *inode, loff_t bytes)
{
diff --git a/fs/ufs/balloc.c b/fs/ufs/balloc.c
index a0376a2..d642cc0 100644
--- a/fs/ufs/balloc.c
+++ b/fs/ufs/balloc.c
@@ -82,7 +82,8 @@
ufs_error (sb, "ufs_free_fragments",
"bit already cleared for fragment %u", i);
}
-
+
+ inode_sub_bytes(inode, count << uspi->s_fshift);
fs32_add(sb, &ucg->cg_cs.cs_nffree, count);
uspi->cs_total.cs_nffree += count;
fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, count);
@@ -184,6 +185,7 @@
ufs_error(sb, "ufs_free_blocks", "freeing free fragment");
}
ubh_setblock(UCPI_UBH(ucpi), ucpi->c_freeoff, blkno);
+ inode_sub_bytes(inode, uspi->s_fpb << uspi->s_fshift);
if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD)
ufs_clusteracct (sb, ucpi, blkno, 1);
@@ -494,6 +496,20 @@
return 0;
}
+static bool try_add_frags(struct inode *inode, unsigned frags)
+{
+ unsigned size = frags * i_blocksize(inode);
+ spin_lock(&inode->i_lock);
+ __inode_add_bytes(inode, size);
+ if (unlikely((u32)inode->i_blocks != inode->i_blocks)) {
+ __inode_sub_bytes(inode, size);
+ spin_unlock(&inode->i_lock);
+ return false;
+ }
+ spin_unlock(&inode->i_lock);
+ return true;
+}
+
static u64 ufs_add_fragments(struct inode *inode, u64 fragment,
unsigned oldcount, unsigned newcount)
{
@@ -530,6 +546,9 @@
for (i = oldcount; i < newcount; i++)
if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_freeoff, fragno + i))
return 0;
+
+ if (!try_add_frags(inode, count))
+ return 0;
/*
* Block can be extended
*/
@@ -647,6 +666,7 @@
ubh_setbit (UCPI_UBH(ucpi), ucpi->c_freeoff, goal + i);
i = uspi->s_fpb - count;
+ inode_sub_bytes(inode, i << uspi->s_fshift);
fs32_add(sb, &ucg->cg_cs.cs_nffree, i);
uspi->cs_total.cs_nffree += i;
fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, i);
@@ -657,6 +677,8 @@
result = ufs_bitmap_search (sb, ucpi, goal, allocsize);
if (result == INVBLOCK)
return 0;
+ if (!try_add_frags(inode, count))
+ return 0;
for (i = 0; i < count; i++)
ubh_clrbit (UCPI_UBH(ucpi), ucpi->c_freeoff, result + i);
@@ -716,6 +738,8 @@
return INVBLOCK;
ucpi->c_rotor = result;
gotit:
+ if (!try_add_frags(inode, uspi->s_fpb))
+ return 0;
blkno = ufs_fragstoblks(result);
ubh_clrblock (UCPI_UBH(ucpi), ucpi->c_freeoff, blkno);
if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD)
diff --git a/fs/ufs/inode.c b/fs/ufs/inode.c
index 7e41aee..da553ff 100644
--- a/fs/ufs/inode.c
+++ b/fs/ufs/inode.c
@@ -235,7 +235,8 @@
p = ufs_get_direct_data_ptr(uspi, ufsi, block);
tmp = ufs_new_fragments(inode, p, lastfrag, ufs_data_ptr_to_cpu(sb, p),
- new_size, err, locked_page);
+ new_size - (lastfrag & uspi->s_fpbmask), err,
+ locked_page);
return tmp != 0;
}
@@ -284,7 +285,7 @@
goal += uspi->s_fpb;
}
tmp = ufs_new_fragments(inode, p, ufs_blknum(new_fragment),
- goal, uspi->s_fpb, err, locked_page);
+ goal, nfrags, err, locked_page);
if (!tmp) {
*err = -ENOSPC;
@@ -402,7 +403,9 @@
if (!create) {
phys64 = ufs_frag_map(inode, offsets, depth);
- goto out;
+ if (phys64)
+ map_bh(bh_result, sb, phys64 + frag);
+ return 0;
}
/* This code entered only while writing ....? */
@@ -841,8 +844,11 @@
truncate_inode_pages_final(&inode->i_data);
if (want_delete) {
inode->i_size = 0;
- if (inode->i_blocks)
+ if (inode->i_blocks &&
+ (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
+ S_ISLNK(inode->i_mode)))
ufs_truncate_blocks(inode);
+ ufs_update_inode(inode, inode_needs_sync(inode));
}
invalidate_inode_buffers(inode);
@@ -1100,7 +1106,7 @@
return err;
}
-static void __ufs_truncate_blocks(struct inode *inode)
+static void ufs_truncate_blocks(struct inode *inode)
{
struct ufs_inode_info *ufsi = UFS_I(inode);
struct super_block *sb = inode->i_sb;
@@ -1183,7 +1189,7 @@
truncate_setsize(inode, size);
- __ufs_truncate_blocks(inode);
+ ufs_truncate_blocks(inode);
inode->i_mtime = inode->i_ctime = current_time(inode);
mark_inode_dirty(inode);
out:
@@ -1191,16 +1197,6 @@
return err;
}
-static void ufs_truncate_blocks(struct inode *inode)
-{
- if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
- S_ISLNK(inode->i_mode)))
- return;
- if (IS_APPEND(inode) || IS_IMMUTABLE(inode))
- return;
- __ufs_truncate_blocks(inode);
-}
-
int ufs_setattr(struct dentry *dentry, struct iattr *attr)
{
struct inode *inode = d_inode(dentry);
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index 29ecaf7..878cc62 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -746,6 +746,23 @@
return;
}
+static u64 ufs_max_bytes(struct super_block *sb)
+{
+ struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+ int bits = uspi->s_apbshift;
+ u64 res;
+
+ if (bits > 21)
+ res = ~0ULL;
+ else
+ res = UFS_NDADDR + (1LL << bits) + (1LL << (2*bits)) +
+ (1LL << (3*bits));
+
+ if (res >= (MAX_LFS_FILESIZE >> uspi->s_bshift))
+ return MAX_LFS_FILESIZE;
+ return res << uspi->s_bshift;
+}
+
static int ufs_fill_super(struct super_block *sb, void *data, int silent)
{
struct ufs_sb_info * sbi;
@@ -1211,6 +1228,7 @@
"fast symlink size (%u)\n", uspi->s_maxsymlinklen);
uspi->s_maxsymlinklen = maxsymlen;
}
+ sb->s_maxbytes = ufs_max_bytes(sb);
sb->s_max_links = UFS_LINK_MAX;
inode = ufs_iget(sb, UFS_ROOTINO);
diff --git a/fs/ufs/util.h b/fs/ufs/util.h
index b7fbf53..398019f 100644
--- a/fs/ufs/util.h
+++ b/fs/ufs/util.h
@@ -473,15 +473,19 @@
static inline int _ubh_isblockset_(struct ufs_sb_private_info * uspi,
struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
{
+ u8 mask;
switch (uspi->s_fpb) {
case 8:
return (*ubh_get_addr (ubh, begin + block) == 0xff);
case 4:
- return (*ubh_get_addr (ubh, begin + (block >> 1)) == (0x0f << ((block & 0x01) << 2)));
+ mask = 0x0f << ((block & 0x01) << 2);
+ return (*ubh_get_addr (ubh, begin + (block >> 1)) & mask) == mask;
case 2:
- return (*ubh_get_addr (ubh, begin + (block >> 2)) == (0x03 << ((block & 0x03) << 1)));
+ mask = 0x03 << ((block & 0x03) << 1);
+ return (*ubh_get_addr (ubh, begin + (block >> 2)) & mask) == mask;
case 1:
- return (*ubh_get_addr (ubh, begin + (block >> 3)) == (0x01 << (block & 0x07)));
+ mask = 0x01 << (block & 0x07);
+ return (*ubh_get_addr (ubh, begin + (block >> 3)) & mask) == mask;
}
return 0;
}