c/mirror_zfs
1
0
Fork 0
mirror of https://git.proxmox.com/git/mirror_zfs.git synced 2026-05-23 02:44:41 +03:00
Code Issues Packages Projects Releases Wiki Activity

Linux: use filemap_range_has_page()

Browse Source 
As of the 4.13 kernel filemap_range_has_page() can be used to
check if there is a page mapped in a given file range.  When
available this interface should be used which eliminates the
need for the zp->z_is_mapped boolean.

Reviewed-by: Brian Atkinson <batkinson@lanl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #14493
This commit is contained in:
Brian Behlendorf
2023-02-14 11:04:34 -08:00
committed by Tony Hutter
parent 9e5a297de6
commit 3ad6c1692f
11 changed files with 65 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files
module/os/linux/zfs/zfs_ctldir.c
+2
View File
@@ -468,7 +468,9 @@ zfsctl_inode_alloc(zfsvfs_t *zfsvfs, uint64_t id,
zp->z_atime_dirty = B_FALSE;
zp->z_zn_prefetch = B_FALSE;
zp->z_is_sa = B_FALSE;
#if !defined(HAVE_FILEMAP_RANGE_HAS_PAGE)
zp->z_is_mapped = B_FALSE;
#endif
zp->z_is_ctldir = B_TRUE;
zp->z_sa_hdl = NULL;
zp->z_blksz = 0;
module/os/linux/zfs/zfs_vnops_os.c
+3 -2
View File
@@ -1021,7 +1021,7 @@ top:
mutex_enter(&zp->z_lock);
may_delete_now = atomic_read(&ZTOI(zp)->i_count) == 1 &&
!(zp->z_is_mapped);
!zn_has_cached_data(zp, 0, LLONG_MAX);
mutex_exit(&zp->z_lock);
/*
@@ -1109,7 +1109,8 @@ top:
&xattr_obj_unlinked, sizeof (xattr_obj_unlinked));
delete_now = may_delete_now && !toobig &&
atomic_read(&ZTOI(zp)->i_count) == 1 &&
!(zp->z_is_mapped) && xattr_obj == xattr_obj_unlinked &&
!zn_has_cached_data(zp, 0, LLONG_MAX) &&
xattr_obj == xattr_obj_unlinked &&
zfs_external_acl(zp) == acl_obj;
}
module/os/linux/zfs/zfs_znode.c
+3 -1
View File
@@ -546,7 +546,9 @@ zfs_znode_alloc(zfsvfs_t *zfsvfs, dmu_buf_t *db, int blksz,
ASSERT3P(zp->z_xattr_cached, ==, NULL);
zp->z_unlinked = B_FALSE;
zp->z_atime_dirty = B_FALSE;
#if !defined(HAVE_FILEMAP_RANGE_HAS_PAGE)
zp->z_is_mapped = B_FALSE;
#endif
zp->z_is_ctldir = B_FALSE;
zp->z_suspended = B_FALSE;
zp->z_sa_hdl = NULL;
@@ -1636,7 +1638,7 @@ zfs_free_range(znode_t *zp, uint64_t off, uint64_t len)
* Zero partial page cache entries. This must be done under a
* range lock in order to keep the ARC and page cache in sync.
*/
if (zp->z_is_mapped) {
if (zn_has_cached_data(zp, off, off + len - 1)) {
loff_t first_page, last_page, page_len;
loff_t first_page_offset, last_page_offset;
module/os/linux/zfs/zpl_file.c
+3 -1
View File
@@ -618,7 +618,6 @@ static int
zpl_mmap(struct file *filp, struct vm_area_struct *vma)
{
struct inode *ip = filp->f_mapping->host;
znode_t *zp = ITOZ(ip);
int error;
fstrans_cookie_t cookie;
@@ -633,9 +632,12 @@ zpl_mmap(struct file *filp, struct vm_area_struct *vma)
if (error)
return (error);
#if !defined(HAVE_FILEMAP_RANGE_HAS_PAGE)
znode_t *zp = ITOZ(ip);
mutex_enter(&zp->z_lock);
zp->z_is_mapped = B_TRUE;
mutex_exit(&zp->z_lock);
#endif
return (error);
}
module/zfs/zfs_vnops.c
+5 -3
View File
@@ -104,7 +104,7 @@ zfs_holey_common(znode_t *zp, ulong_t cmd, loff_t *off)
hole = B_FALSE;
/* Flush any mmap()'d data to disk */
if (zn_has_cached_data(zp))
if (zn_has_cached_data(zp, 0, file_sz - 1))
zn_flush_cached_data(zp, B_FALSE);
lr = zfs_rangelock_enter(&zp->z_rangelock, 0, UINT64_MAX, RL_READER);
@@ -277,7 +277,8 @@ zfs_read(struct znode *zp, zfs_uio_t *uio, int ioflag, cred_t *cr)
error = mappedread_sf(zp, nbytes, uio);
else
#endif
if (zn_has_cached_data(zp) && !(ioflag & O_DIRECT)) {
if (zn_has_cached_data(zp, zfs_uio_offset(uio),
zfs_uio_offset(uio) + nbytes - 1) && !(ioflag & O_DIRECT)) {
error = mappedread(zp, nbytes, uio);
} else {
error = dmu_read_uio_dbuf(sa_get_db(zp->z_sa_hdl),
@@ -688,7 +689,8 @@ zfs_write(znode_t *zp, zfs_uio_t *uio, int ioflag, cred_t *cr)
zfs_uioskip(uio, nbytes);
tx_bytes = nbytes;
}
if (tx_bytes && zn_has_cached_data(zp) &&
if (tx_bytes &&
zn_has_cached_data(zp, woff, woff + tx_bytes - 1) &&
!(ioflag & O_DIRECT)) {
update_pages(zp, woff, tx_bytes, zfsvfs->z_os);
}