diff options
| -rw-r--r-- | fs/ceph/addr.c | 66 |
1 files changed, 39 insertions, 27 deletions
diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index d52e3bcfda7c..3e204b9ff9f7 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -1315,6 +1315,17 @@ const struct address_space_operations ceph_aops = { .direct_IO = ceph_direct_io, }; +static void ceph_block_sigs(sigset_t *oldset) +{ + sigset_t mask; + siginitsetinv(&mask, sigmask(SIGKILL)); + sigprocmask(SIG_BLOCK, &mask, oldset); +} + +static void ceph_restore_sigs(sigset_t *oldset) +{ + sigprocmask(SIG_SETMASK, oldset, NULL); +} /* * vm ops @@ -1327,6 +1338,9 @@ static int ceph_filemap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) struct page *pinned_page = NULL; loff_t off = vmf->pgoff << PAGE_SHIFT; int want, got, ret; + sigset_t oldset; + + ceph_block_sigs(&oldset); dout("filemap_fault %p %llx.%llx %llu~%zd trying to get caps\n", inode, ceph_vinop(inode), off, (size_t)PAGE_SIZE); @@ -1334,16 +1348,12 @@ static int ceph_filemap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) want = CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO; else want = CEPH_CAP_FILE_CACHE; - while (1) { - got = 0; - ret = ceph_get_caps(ci, CEPH_CAP_FILE_RD, want, - -1, &got, &pinned_page); - if (ret == 0) - break; - if (ret != -ERESTARTSYS) { - WARN_ON(1); - return VM_FAULT_SIGBUS; - } + + got = 0; + ret = ceph_get_caps(ci, CEPH_CAP_FILE_RD, want, -1, &got, &pinned_page); + if (ret < 0) { + ret = VM_FAULT_SIGBUS; + goto out_restore; } dout("filemap_fault %p %llu~%zd got cap refs on %s\n", inode, off, (size_t)PAGE_SIZE, ceph_cap_string(got)); @@ -1361,7 +1371,7 @@ static int ceph_filemap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) ceph_put_cap_refs(ci, got); if (ret != -EAGAIN) - return ret; + goto out_restore; /* read inline data */ if (off >= PAGE_SIZE) { @@ -1375,7 +1385,7 @@ static int ceph_filemap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) ~__GFP_FS)); if (!page) { ret = VM_FAULT_OOM; - goto out; + goto out_inline; } ret1 = __ceph_do_getattr(inode, page, CEPH_STAT_CAP_INLINE_DATA, true); @@ -1383,7 +1393,7 @@ static int ceph_filemap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) unlock_page(page); put_page(page); ret = VM_FAULT_SIGBUS; - goto out; + goto out_inline; } if (ret1 < PAGE_SIZE) zero_user_segment(page, ret1, PAGE_SIZE); @@ -1392,10 +1402,12 @@ static int ceph_filemap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) SetPageUptodate(page); vmf->page = page; ret = VM_FAULT_MAJOR | VM_FAULT_LOCKED; +out_inline: + dout("filemap_fault %p %llu~%zd read inline data ret %d\n", + inode, off, (size_t)PAGE_SIZE, ret); } -out: - dout("filemap_fault %p %llu~%zd read inline data ret %d\n", - inode, off, (size_t)PAGE_SIZE, ret); +out_restore: + ceph_restore_sigs(&oldset); return ret; } @@ -1413,11 +1425,14 @@ static int ceph_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) loff_t size = i_size_read(inode); size_t len; int want, got, ret; + sigset_t oldset; prealloc_cf = ceph_alloc_cap_flush(); if (!prealloc_cf) return VM_FAULT_SIGBUS; + ceph_block_sigs(&oldset); + if (ci->i_inline_version != CEPH_INLINE_NONE) { struct page *locked_page = NULL; if (off == 0) { @@ -1444,17 +1459,13 @@ static int ceph_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO; else want = CEPH_CAP_FILE_BUFFER; - while (1) { - got = 0; - ret = ceph_get_caps(ci, CEPH_CAP_FILE_WR, want, off + len, - &got, NULL); - if (ret == 0) - break; - if (ret != -ERESTARTSYS) { - WARN_ON(1); - ret = VM_FAULT_SIGBUS; - goto out_free; - } + + got = 0; + ret = ceph_get_caps(ci, CEPH_CAP_FILE_WR, want, off + len, + &got, NULL); + if (ret < 0) { + ret = VM_FAULT_SIGBUS; + goto out_free; } dout("page_mkwrite %p %llu~%zd got cap refs on %s\n", inode, off, len, ceph_cap_string(got)); @@ -1499,6 +1510,7 @@ out: inode, off, len, ceph_cap_string(got), ret); ceph_put_cap_refs(ci, got); out_free: + ceph_restore_sigs(&oldset); ceph_free_cap_flush(prealloc_cf); return ret; |