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Diffstat (limited to 'fs/ocfs2/extent_map.c')
-rw-r--r--fs/ocfs2/extent_map.c140
1 files changed, 124 insertions, 16 deletions
diff --git a/fs/ocfs2/extent_map.c b/fs/ocfs2/extent_map.c
index 843db64e9d4..767370b656c 100644
--- a/fs/ocfs2/extent_map.c
+++ b/fs/ocfs2/extent_map.c
@@ -24,10 +24,10 @@
#include <linux/fs.h>
#include <linux/init.h>
+#include <linux/slab.h>
#include <linux/types.h>
#include <linux/fiemap.h>
-#define MLOG_MASK_PREFIX ML_EXTENT_MAP
#include <cluster/masklog.h>
#include "ocfs2.h"
@@ -37,6 +37,8 @@
#include "extent_map.h"
#include "inode.h"
#include "super.h"
+#include "symlink.h"
+#include "ocfs2_trace.h"
#include "buffer_head_io.h"
@@ -191,7 +193,7 @@ static int ocfs2_try_to_merge_extent_map(struct ocfs2_extent_map_item *emi,
emi->ei_clusters += ins->ei_clusters;
return 1;
} else if ((ins->ei_phys + ins->ei_clusters) == emi->ei_phys &&
- (ins->ei_cpos + ins->ei_clusters) == emi->ei_phys &&
+ (ins->ei_cpos + ins->ei_clusters) == emi->ei_cpos &&
ins->ei_flags == emi->ei_flags) {
emi->ei_phys = ins->ei_phys;
emi->ei_cpos = ins->ei_cpos;
@@ -280,8 +282,7 @@ search:
spin_unlock(&oi->ip_lock);
out:
- if (new_emi)
- kfree(new_emi);
+ kfree(new_emi);
}
static int ocfs2_last_eb_is_empty(struct inode *inode,
@@ -452,7 +453,7 @@ static int ocfs2_get_clusters_nocache(struct inode *inode,
if (i == -1) {
/*
* Holes can be larger than the maximum size of an
- * extent, so we return their lengths in a seperate
+ * extent, so we return their lengths in a separate
* field.
*/
if (hole_len) {
@@ -703,6 +704,12 @@ out:
return ret;
}
+/*
+ * The ocfs2_fiemap_inline() may be a little bit misleading, since
+ * it not only handles the fiemap for inlined files, but also deals
+ * with the fast symlink, cause they have no difference for extent
+ * mapping per se.
+ */
static int ocfs2_fiemap_inline(struct inode *inode, struct buffer_head *di_bh,
struct fiemap_extent_info *fieinfo,
u64 map_start)
@@ -715,11 +722,18 @@ static int ocfs2_fiemap_inline(struct inode *inode, struct buffer_head *di_bh,
struct ocfs2_inode_info *oi = OCFS2_I(inode);
di = (struct ocfs2_dinode *)di_bh->b_data;
- id_count = le16_to_cpu(di->id2.i_data.id_count);
+ if (ocfs2_inode_is_fast_symlink(inode))
+ id_count = ocfs2_fast_symlink_chars(inode->i_sb);
+ else
+ id_count = le16_to_cpu(di->id2.i_data.id_count);
if (map_start < id_count) {
phys = oi->ip_blkno << inode->i_sb->s_blocksize_bits;
- phys += offsetof(struct ocfs2_dinode, id2.i_data.id_data);
+ if (ocfs2_inode_is_fast_symlink(inode))
+ phys += offsetof(struct ocfs2_dinode, id2.i_symlink);
+ else
+ phys += offsetof(struct ocfs2_dinode,
+ id2.i_data.id_data);
ret = fiemap_fill_next_extent(fieinfo, 0, phys, id_count,
flags);
@@ -756,9 +770,10 @@ int ocfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
down_read(&OCFS2_I(inode)->ip_alloc_sem);
/*
- * Handle inline-data separately.
+ * Handle inline-data and fast symlink separately.
*/
- if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
+ if ((OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) ||
+ ocfs2_inode_is_fast_symlink(inode)) {
ret = ocfs2_fiemap_inline(inode, di_bh, fieinfo, map_start);
goto out_unlock;
}
@@ -766,7 +781,6 @@ int ocfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
cpos = map_start >> osb->s_clustersize_bits;
mapping_end = ocfs2_clusters_for_bytes(inode->i_sb,
map_start + map_len);
- mapping_end -= cpos;
is_last = 0;
while (cpos < mapping_end && !is_last) {
u32 fe_flags;
@@ -775,7 +789,7 @@ int ocfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
&hole_size, &rec, &is_last);
if (ret) {
mlog_errno(ret);
- goto out;
+ goto out_unlock;
}
if (rec.e_blkno == 0ULL) {
@@ -786,6 +800,8 @@ int ocfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
fe_flags = 0;
if (rec.e_flags & OCFS2_EXT_UNWRITTEN)
fe_flags |= FIEMAP_EXTENT_UNWRITTEN;
+ if (rec.e_flags & OCFS2_EXT_REFCOUNTED)
+ fe_flags |= FIEMAP_EXTENT_SHARED;
if (is_last)
fe_flags |= FIEMAP_EXTENT_LAST;
len_bytes = (u64)le16_to_cpu(rec.e_leaf_clusters) << osb->s_clustersize_bits;
@@ -814,6 +830,100 @@ out:
return ret;
}
+int ocfs2_seek_data_hole_offset(struct file *file, loff_t *offset, int whence)
+{
+ struct inode *inode = file->f_mapping->host;
+ int ret;
+ unsigned int is_last = 0, is_data = 0;
+ u16 cs_bits = OCFS2_SB(inode->i_sb)->s_clustersize_bits;
+ u32 cpos, cend, clen, hole_size;
+ u64 extoff, extlen;
+ struct buffer_head *di_bh = NULL;
+ struct ocfs2_extent_rec rec;
+
+ BUG_ON(whence != SEEK_DATA && whence != SEEK_HOLE);
+
+ ret = ocfs2_inode_lock(inode, &di_bh, 0);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ down_read(&OCFS2_I(inode)->ip_alloc_sem);
+
+ if (*offset >= i_size_read(inode)) {
+ ret = -ENXIO;
+ goto out_unlock;
+ }
+
+ if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
+ if (whence == SEEK_HOLE)
+ *offset = i_size_read(inode);
+ goto out_unlock;
+ }
+
+ clen = 0;
+ cpos = *offset >> cs_bits;
+ cend = ocfs2_clusters_for_bytes(inode->i_sb, i_size_read(inode));
+
+ while (cpos < cend && !is_last) {
+ ret = ocfs2_get_clusters_nocache(inode, di_bh, cpos, &hole_size,
+ &rec, &is_last);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_unlock;
+ }
+
+ extoff = cpos;
+ extoff <<= cs_bits;
+
+ if (rec.e_blkno == 0ULL) {
+ clen = hole_size;
+ is_data = 0;
+ } else {
+ clen = le16_to_cpu(rec.e_leaf_clusters) -
+ (cpos - le32_to_cpu(rec.e_cpos));
+ is_data = (rec.e_flags & OCFS2_EXT_UNWRITTEN) ? 0 : 1;
+ }
+
+ if ((!is_data && whence == SEEK_HOLE) ||
+ (is_data && whence == SEEK_DATA)) {
+ if (extoff > *offset)
+ *offset = extoff;
+ goto out_unlock;
+ }
+
+ if (!is_last)
+ cpos += clen;
+ }
+
+ if (whence == SEEK_HOLE) {
+ extoff = cpos;
+ extoff <<= cs_bits;
+ extlen = clen;
+ extlen <<= cs_bits;
+
+ if ((extoff + extlen) > i_size_read(inode))
+ extlen = i_size_read(inode) - extoff;
+ extoff += extlen;
+ if (extoff > *offset)
+ *offset = extoff;
+ goto out_unlock;
+ }
+
+ ret = -ENXIO;
+
+out_unlock:
+
+ brelse(di_bh);
+
+ up_read(&OCFS2_I(inode)->ip_alloc_sem);
+
+ ocfs2_inode_unlock(inode, 0);
+out:
+ return ret;
+}
+
int ocfs2_read_virt_blocks(struct inode *inode, u64 v_block, int nr,
struct buffer_head *bhs[], int flags,
int (*validate)(struct super_block *sb,
@@ -823,10 +933,9 @@ int ocfs2_read_virt_blocks(struct inode *inode, u64 v_block, int nr,
u64 p_block, p_count;
int i, count, done = 0;
- mlog_entry("(inode = %p, v_block = %llu, nr = %d, bhs = %p, "
- "flags = %x, validate = %p)\n",
- inode, (unsigned long long)v_block, nr, bhs, flags,
- validate);
+ trace_ocfs2_read_virt_blocks(
+ inode, (unsigned long long)v_block, nr, bhs, flags,
+ validate);
if (((v_block + nr - 1) << inode->i_sb->s_blocksize_bits) >=
i_size_read(inode)) {
@@ -879,7 +988,6 @@ int ocfs2_read_virt_blocks(struct inode *inode, u64 v_block, int nr,
}
out:
- mlog_exit(rc);
return rc;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-07 00:26:52 +0000