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-rw-r--r--fs/gfs2/bmap.c108
-rw-r--r--fs/gfs2/incore.h6
-rw-r--r--fs/gfs2/inode.c20
-rw-r--r--fs/gfs2/inode.h2
-rw-r--r--fs/gfs2/super.c2
5 files changed, 55 insertions, 83 deletions
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index a25444ac648b..5a3187049dd7 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -166,7 +166,7 @@ int gfs2_unstuff_dinode(struct gfs2_inode *ip, struct page *page)
di->di_blocks = cpu_to_be64(ip->i_di.di_blocks);
}
- ip->i_di.di_height = 1;
+ ip->i_height = 1;
di->di_height = cpu_to_be16(1);
out_brelse:
@@ -177,43 +177,6 @@ out:
}
/**
- * calc_tree_height - Calculate the height of a metadata tree
- * @ip: The GFS2 inode
- * @size: The proposed size of the file
- *
- * Work out how tall a metadata tree needs to be in order to accommodate a
- * file of a particular size. If size is less than the current size of
- * the inode, then the current size of the inode is used instead of the
- * supplied one.
- *
- * Returns: the height the tree should be
- */
-
-static unsigned int calc_tree_height(struct gfs2_inode *ip, u64 size)
-{
- struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
- u64 *arr;
- unsigned int max, height;
-
- if (ip->i_di.di_size > size)
- size = ip->i_di.di_size;
-
- if (gfs2_is_dir(ip)) {
- arr = sdp->sd_jheightsize;
- max = sdp->sd_max_jheight;
- } else {
- arr = sdp->sd_heightsize;
- max = sdp->sd_max_height;
- }
-
- for (height = 0; height < max; height++)
- if (arr[height] >= size)
- break;
-
- return height;
-}
-
-/**
* build_height - Build a metadata tree of the requested height
* @ip: The GFS2 inode
* @height: The height to build to
@@ -225,7 +188,7 @@ static unsigned int calc_tree_height(struct gfs2_inode *ip, u64 size)
static int build_height(struct inode *inode, unsigned height)
{
struct gfs2_inode *ip = GFS2_I(inode);
- unsigned new_height = height - ip->i_di.di_height;
+ unsigned new_height = height - ip->i_height;
struct buffer_head *dibh;
struct buffer_head *blocks[GFS2_MAX_META_HEIGHT];
struct gfs2_dinode *di;
@@ -234,7 +197,7 @@ static int build_height(struct inode *inode, unsigned height)
u64 bn;
unsigned n;
- if (height <= ip->i_di.di_height)
+ if (height <= ip->i_height)
return 0;
error = gfs2_meta_inode_buffer(ip, &dibh);
@@ -270,10 +233,10 @@ static int build_height(struct inode *inode, unsigned height)
di = (struct gfs2_dinode *)dibh->b_data;
gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
*(__be64 *)(di + 1) = cpu_to_be64(bn);
- ip->i_di.di_height += new_height;
+ ip->i_height += new_height;
ip->i_di.di_blocks += new_height;
gfs2_set_inode_blocks(&ip->i_inode);
- di->di_height = cpu_to_be16(ip->i_di.di_height);
+ di->di_height = cpu_to_be16(ip->i_height);
di->di_blocks = cpu_to_be64(ip->i_di.di_blocks);
brelse(dibh);
return error;
@@ -345,7 +308,7 @@ static void find_metapath(struct gfs2_inode *ip, u64 block,
u64 b = block;
unsigned int i;
- for (i = ip->i_di.di_height; i--;)
+ for (i = ip->i_height; i--;)
mp->mp_list[i] = do_div(b, sdp->sd_inptrs);
}
@@ -407,7 +370,7 @@ static int lookup_block(struct gfs2_inode *ip, struct buffer_head *bh,
if (!create)
return 0;
- if (height == ip->i_di.di_height - 1 && !gfs2_is_dir(ip))
+ if (height == ip->i_height - 1 && !gfs2_is_dir(ip))
*block = gfs2_alloc_data(ip);
else
*block = gfs2_alloc_meta(ip);
@@ -458,8 +421,7 @@ int gfs2_block_map(struct inode *inode, sector_t lblock,
struct gfs2_inode *ip = GFS2_I(inode);
struct gfs2_sbd *sdp = GFS2_SB(inode);
struct buffer_head *bh;
- unsigned int bsize;
- unsigned int height;
+ unsigned int bsize = sdp->sd_sb.sb_bsize;
unsigned int end_of_metadata;
unsigned int x;
int error = 0;
@@ -470,7 +432,7 @@ int gfs2_block_map(struct inode *inode, sector_t lblock,
struct metapath mp;
u64 size;
struct buffer_head *dibh = NULL;
-
+ const u64 *arr = sdp->sd_heightsize;
BUG_ON(maxlen == 0);
if (gfs2_assert_warn(sdp, !gfs2_is_stuffed(ip)))
@@ -480,23 +442,25 @@ int gfs2_block_map(struct inode *inode, sector_t lblock,
clear_buffer_mapped(bh_map);
clear_buffer_new(bh_map);
clear_buffer_boundary(bh_map);
- bsize = gfs2_is_dir(ip) ? sdp->sd_jbsize : sdp->sd_sb.sb_bsize;
+ if (gfs2_is_dir(ip)) {
+ bsize = sdp->sd_jbsize;
+ arr = sdp->sd_jheightsize;
+ }
size = (lblock + 1) * bsize;
- if (size > ip->i_di.di_size) {
- height = calc_tree_height(ip, size);
- if (ip->i_di.di_height < height) {
- if (!create)
- goto out_ok;
-
- error = build_height(inode, height);
- if (error)
- goto out_fail;
- }
+ if (size > arr[ip->i_height]) {
+ u8 height = ip->i_height;
+ if (!create)
+ goto out_ok;
+ while (size > arr[height])
+ height++;
+ error = build_height(inode, height);
+ if (error)
+ goto out_fail;
}
find_metapath(ip, lblock, &mp);
- end_of_metadata = ip->i_di.di_height - 1;
+ end_of_metadata = ip->i_height - 1;
error = gfs2_meta_inode_buffer(ip, &bh);
if (error)
goto out_fail;
@@ -624,7 +588,7 @@ static int recursive_scan(struct gfs2_inode *ip, struct buffer_head *dibh,
if (error)
goto out;
- if (height < ip->i_di.di_height - 1)
+ if (height < ip->i_height - 1)
for (; top < bottom; top++, first = 0) {
if (!*top)
continue;
@@ -682,7 +646,7 @@ static int do_strip(struct gfs2_inode *ip, struct buffer_head *dibh,
sm->sm_first = 0;
}
- metadata = (height != ip->i_di.di_height - 1);
+ metadata = (height != ip->i_height - 1);
if (metadata)
revokes = (height) ? sdp->sd_inptrs : sdp->sd_diptrs;
@@ -807,7 +771,6 @@ static int do_grow(struct gfs2_inode *ip, u64 size)
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
struct gfs2_alloc *al;
struct buffer_head *dibh;
- unsigned int h;
int error;
al = gfs2_alloc_get(ip);
@@ -833,20 +796,23 @@ static int do_grow(struct gfs2_inode *ip, u64 size)
goto out_ipres;
if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode)) {
+ const u64 *arr = sdp->sd_heightsize;
if (gfs2_is_stuffed(ip)) {
error = gfs2_unstuff_dinode(ip, NULL);
if (error)
goto out_end_trans;
}
- h = calc_tree_height(ip, size);
- if (ip->i_di.di_height < h) {
- down_write(&ip->i_rw_mutex);
- error = build_height(&ip->i_inode, h);
- up_write(&ip->i_rw_mutex);
- if (error)
- goto out_end_trans;
+ down_write(&ip->i_rw_mutex);
+ if (size > arr[ip->i_height]) {
+ u8 height = ip->i_height;
+ while(size > arr[height])
+ height++;
+ error = build_height(&ip->i_inode, height);
}
+ up_write(&ip->i_rw_mutex);
+ if (error)
+ goto out_end_trans;
}
ip->i_di.di_size = size;
@@ -989,7 +955,7 @@ out:
static int trunc_dealloc(struct gfs2_inode *ip, u64 size)
{
- unsigned int height = ip->i_di.di_height;
+ unsigned int height = ip->i_height;
u64 lblock;
struct metapath mp;
int error;
@@ -1040,7 +1006,7 @@ static int trunc_end(struct gfs2_inode *ip)
goto out;
if (!ip->i_di.di_size) {
- ip->i_di.di_height = 0;
+ ip->i_height = 0;
ip->i_di.di_goal_meta =
ip->i_di.di_goal_data =
ip->i_no_addr;
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index 525dcae352d6..43472baa92e7 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -246,7 +246,6 @@ struct gfs2_dinode_host {
u64 di_goal_data; /* data block goal */
u64 di_generation; /* generation number for NFS */
u32 di_flags; /* GFS2_DIF_... */
- u16 di_height; /* height of metadata */
/* These only apply to directories */
u16 di_depth; /* Number of bits in the table */
u32 di_entries; /* The number of entries in the directory */
@@ -268,6 +267,7 @@ struct gfs2_inode {
u64 i_last_rg_alloc;
struct rw_semaphore i_rw_mutex;
+ u8 i_height;
};
/*
@@ -490,9 +490,9 @@ struct gfs2_sbd {
u32 sd_qc_per_block;
u32 sd_max_dirres; /* Max blocks needed to add a directory entry */
u32 sd_max_height; /* Max height of a file's metadata tree */
- u64 sd_heightsize[GFS2_MAX_META_HEIGHT];
+ u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
u32 sd_max_jheight; /* Max height of journaled file's meta tree */
- u64 sd_jheightsize[GFS2_MAX_META_HEIGHT];
+ u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
struct gfs2_args sd_args; /* Mount arguments */
struct gfs2_tune sd_tune; /* Filesystem tuning structure */
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 37725ade3c51..ff66ab7a17c8 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -248,12 +248,10 @@ static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
{
struct gfs2_dinode_host *di = &ip->i_di;
const struct gfs2_dinode *str = buf;
+ u16 height;
- if (ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)) {
- if (gfs2_consist_inode(ip))
- gfs2_dinode_print(ip);
- return -EIO;
- }
+ if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)))
+ goto corrupt;
ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
ip->i_inode.i_mode = be32_to_cpu(str->di_mode);
ip->i_inode.i_rdev = 0;
@@ -290,7 +288,10 @@ static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
di->di_flags = be32_to_cpu(str->di_flags);
gfs2_set_inode_flags(&ip->i_inode);
- di->di_height = be16_to_cpu(str->di_height);
+ height = be16_to_cpu(str->di_height);
+ if (unlikely(height > GFS2_MAX_META_HEIGHT))
+ goto corrupt;
+ ip->i_height = (u8)height;
di->di_depth = be16_to_cpu(str->di_depth);
di->di_entries = be32_to_cpu(str->di_entries);
@@ -300,6 +301,10 @@ static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
gfs2_set_aops(&ip->i_inode);
return 0;
+corrupt:
+ if (gfs2_consist_inode(ip))
+ gfs2_dinode_print(ip);
+ return -EIO;
}
/**
@@ -1401,7 +1406,7 @@ void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf)
str->di_generation = cpu_to_be64(di->di_generation);
str->di_flags = cpu_to_be32(di->di_flags);
- str->di_height = cpu_to_be16(di->di_height);
+ str->di_height = cpu_to_be16(ip->i_height);
str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) &&
!(ip->i_di.di_flags & GFS2_DIF_EXHASH) ?
GFS2_FORMAT_DE : 0);
@@ -1430,7 +1435,6 @@ void gfs2_dinode_print(const struct gfs2_inode *ip)
printk(KERN_INFO " di_goal_data = %llu\n",
(unsigned long long)di->di_goal_data);
printk(KERN_INFO " di_flags = 0x%.8X\n", di->di_flags);
- printk(KERN_INFO " di_height = %u\n", di->di_height);
printk(KERN_INFO " di_depth = %u\n", di->di_depth);
printk(KERN_INFO " di_entries = %u\n", di->di_entries);
printk(KERN_INFO " di_eattr = %llu\n",
diff --git a/fs/gfs2/inode.h b/fs/gfs2/inode.h
index d44650662615..db738686ca1d 100644
--- a/fs/gfs2/inode.h
+++ b/fs/gfs2/inode.h
@@ -12,7 +12,7 @@
static inline int gfs2_is_stuffed(const struct gfs2_inode *ip)
{
- return !ip->i_di.di_height;
+ return !ip->i_height;
}
static inline int gfs2_is_jdata(const struct gfs2_inode *ip)
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index ef0562c3bc71..88497b0b7339 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -316,6 +316,7 @@ int gfs2_read_sb(struct gfs2_sbd *sdp, struct gfs2_glock *gl, int silent)
sdp->sd_heightsize[x] = space;
}
sdp->sd_max_height = x;
+ sdp->sd_heightsize[x] = ~0;
gfs2_assert(sdp, sdp->sd_max_height <= GFS2_MAX_META_HEIGHT);
sdp->sd_jheightsize[0] = sdp->sd_sb.sb_bsize -
@@ -334,6 +335,7 @@ int gfs2_read_sb(struct gfs2_sbd *sdp, struct gfs2_glock *gl, int silent)
sdp->sd_jheightsize[x] = space;
}
sdp->sd_max_jheight = x;
+ sdp->sd_jheightsize[x] = ~0;
gfs2_assert(sdp, sdp->sd_max_jheight <= GFS2_MAX_META_HEIGHT);
return 0;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.