* of the GNU General Public License version 2.
*/
-#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/uio.h>
#include <linux/blkdev.h>
#include <linux/mm.h>
-#include <linux/smp_lock.h>
#include <linux/fs.h>
#include <linux/gfs2_ondisk.h>
#include <linux/ext2_fs.h>
#include "glock.h"
#include "glops.h"
#include "inode.h"
-#include "lm.h"
#include "log.h"
#include "meta_io.h"
-#include "ops_file.h"
-#include "ops_vm.h"
#include "quota.h"
#include "rgrp.h"
#include "trans.h"
#include "util.h"
#include "eaops.h"
-
-/*
- * Most fields left uninitialised to catch anybody who tries to
- * use them. f_flags set to prevent file_accessed() from touching
- * any other part of this. Its use is purely as a flag so that we
- * know (in readpage()) whether or not do to locking.
- */
-struct file gfs2_internal_file_sentinel = {
- .f_flags = O_NOATIME|O_RDONLY,
-};
-
-static int gfs2_read_actor(read_descriptor_t *desc, struct page *page,
- unsigned long offset, unsigned long size)
-{
- char *kaddr;
- unsigned long count = desc->count;
-
- if (size > count)
- size = count;
-
- kaddr = kmap(page);
- memcpy(desc->arg.data, kaddr + offset, size);
- kunmap(page);
-
- desc->count = count - size;
- desc->written += size;
- desc->arg.buf += size;
- return size;
-}
-
-int gfs2_internal_read(struct gfs2_inode *ip, struct file_ra_state *ra_state,
- char *buf, loff_t *pos, unsigned size)
-{
- struct inode *inode = &ip->i_inode;
- read_descriptor_t desc;
- desc.written = 0;
- desc.arg.data = buf;
- desc.count = size;
- desc.error = 0;
- do_generic_mapping_read(inode->i_mapping, ra_state,
- &gfs2_internal_file_sentinel, pos, &desc,
- gfs2_read_actor);
- return desc.written ? desc.written : desc.error;
-}
+#include "ops_address.h"
+#include "ops_inode.h"
/**
* gfs2_llseek - seek to a location in a file
[5] = GFS2_DIF_APPENDONLY,
[7] = GFS2_DIF_NOATIME,
[12] = GFS2_DIF_EXHASH,
- [14] = GFS2_DIF_JDATA,
- [20] = GFS2_DIF_DIRECTIO,
+ [14] = GFS2_DIF_INHERIT_JDATA,
+ [20] = GFS2_DIF_INHERIT_DIRECTIO,
};
static const u32 gfs2_to_fsflags[32] = {
[gfs2fl_AppendOnly] = FS_APPEND_FL,
[gfs2fl_NoAtime] = FS_NOATIME_FL,
[gfs2fl_ExHash] = FS_INDEX_FL,
- [gfs2fl_Jdata] = FS_JOURNAL_DATA_FL,
- [gfs2fl_Directio] = FS_DIRECTIO_FL,
[gfs2fl_InheritDirectio] = FS_DIRECTIO_FL,
[gfs2fl_InheritJdata] = FS_JOURNAL_DATA_FL,
};
return error;
fsflags = fsflags_cvt(gfs2_to_fsflags, ip->i_di.di_flags);
+ if (!S_ISDIR(inode->i_mode)) {
+ if (ip->i_di.di_flags & GFS2_DIF_JDATA)
+ fsflags |= FS_JOURNAL_DATA_FL;
+ if (ip->i_di.di_flags & GFS2_DIF_DIRECTIO)
+ fsflags |= FS_DIRECTIO_FL;
+ }
if (put_user(fsflags, ptr))
error = -EFAULT;
- gfs2_glock_dq_m(1, &gh);
+ gfs2_glock_dq(&gh);
gfs2_holder_uninit(&gh);
return error;
}
if ((new_flags ^ flags) == 0)
goto out;
- if (S_ISDIR(inode->i_mode)) {
- if ((new_flags ^ flags) & GFS2_DIF_JDATA)
- new_flags ^= (GFS2_DIF_JDATA|GFS2_DIF_INHERIT_JDATA);
- if ((new_flags ^ flags) & GFS2_DIF_DIRECTIO)
- new_flags ^= (GFS2_DIF_DIRECTIO|GFS2_DIF_INHERIT_DIRECTIO);
- }
-
error = -EINVAL;
if ((new_flags ^ flags) & ~GFS2_FLAGS_USER_SET)
goto out;
if (error)
goto out;
}
-
+ if ((flags ^ new_flags) & GFS2_DIF_JDATA) {
+ if (flags & GFS2_DIF_JDATA)
+ gfs2_log_flush(sdp, ip->i_gl);
+ error = filemap_fdatawrite(inode->i_mapping);
+ if (error)
+ goto out;
+ error = filemap_fdatawait(inode->i_mapping);
+ if (error)
+ goto out;
+ }
error = gfs2_trans_begin(sdp, RES_DINODE, 0);
if (error)
goto out;
gfs2_dinode_out(ip, bh->b_data);
brelse(bh);
gfs2_set_inode_flags(inode);
+ gfs2_set_aops(inode);
out_trans_end:
gfs2_trans_end(sdp);
out:
static int gfs2_set_flags(struct file *filp, u32 __user *ptr)
{
+ struct inode *inode = filp->f_path.dentry->d_inode;
u32 fsflags, gfsflags;
if (get_user(fsflags, ptr))
return -EFAULT;
gfsflags = fsflags_cvt(fsflags_to_gfs2, fsflags);
- return do_gfs2_set_flags(filp, gfsflags, ~0);
+ if (!S_ISDIR(inode->i_mode)) {
+ if (gfsflags & GFS2_DIF_INHERIT_JDATA)
+ gfsflags ^= (GFS2_DIF_JDATA | GFS2_DIF_INHERIT_JDATA);
+ if (gfsflags & GFS2_DIF_INHERIT_DIRECTIO)
+ gfsflags ^= (GFS2_DIF_DIRECTIO | GFS2_DIF_INHERIT_DIRECTIO);
+ return do_gfs2_set_flags(filp, gfsflags, ~0);
+ }
+ return do_gfs2_set_flags(filp, gfsflags, ~GFS2_DIF_JDATA);
}
static long gfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
return -ENOTTY;
}
+/**
+ * gfs2_allocate_page_backing - Use bmap to allocate blocks
+ * @page: The (locked) page to allocate backing for
+ *
+ * We try to allocate all the blocks required for the page in
+ * one go. This might fail for various reasons, so we keep
+ * trying until all the blocks to back this page are allocated.
+ * If some of the blocks are already allocated, thats ok too.
+ */
+
+static int gfs2_allocate_page_backing(struct page *page)
+{
+ struct inode *inode = page->mapping->host;
+ struct buffer_head bh;
+ unsigned long size = PAGE_CACHE_SIZE;
+ u64 lblock = page->index << (PAGE_CACHE_SHIFT - inode->i_blkbits);
+
+ do {
+ bh.b_state = 0;
+ bh.b_size = size;
+ gfs2_block_map(inode, lblock, &bh, 1);
+ if (!buffer_mapped(&bh))
+ return -EIO;
+ size -= bh.b_size;
+ lblock += (bh.b_size >> inode->i_blkbits);
+ } while(size > 0);
+ return 0;
+}
+
+/**
+ * gfs2_page_mkwrite - Make a shared, mmap()ed, page writable
+ * @vma: The virtual memory area
+ * @page: The page which is about to become writable
+ *
+ * When the page becomes writable, we need to ensure that we have
+ * blocks allocated on disk to back that page.
+ */
+
+static int gfs2_page_mkwrite(struct vm_area_struct *vma, struct page *page)
+{
+ struct inode *inode = vma->vm_file->f_path.dentry->d_inode;
+ struct gfs2_inode *ip = GFS2_I(inode);
+ struct gfs2_sbd *sdp = GFS2_SB(inode);
+ unsigned long last_index;
+ u64 pos = page->index << (PAGE_CACHE_SIZE - inode->i_blkbits);
+ unsigned int data_blocks, ind_blocks, rblocks;
+ int alloc_required = 0;
+ struct gfs2_holder gh;
+ struct gfs2_alloc *al;
+ int ret;
+
+ gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_ATIME, &gh);
+ ret = gfs2_glock_nq_atime(&gh);
+ if (ret)
+ goto out;
+
+ set_bit(GIF_SW_PAGED, &ip->i_flags);
+ gfs2_write_calc_reserv(ip, PAGE_CACHE_SIZE, &data_blocks, &ind_blocks);
+ ret = gfs2_write_alloc_required(ip, pos, PAGE_CACHE_SIZE, &alloc_required);
+ if (ret || !alloc_required)
+ goto out_unlock;
+ ret = -ENOMEM;
+ al = gfs2_alloc_get(ip);
+ if (al == NULL)
+ goto out_unlock;
+
+ ret = gfs2_quota_lock_check(ip);
+ if (ret)
+ goto out_alloc_put;
+ al->al_requested = data_blocks + ind_blocks;
+ ret = gfs2_inplace_reserve(ip);
+ if (ret)
+ goto out_quota_unlock;
+
+ rblocks = RES_DINODE + ind_blocks;
+ if (gfs2_is_jdata(ip))
+ rblocks += data_blocks ? data_blocks : 1;
+ if (ind_blocks || data_blocks)
+ rblocks += RES_STATFS + RES_QUOTA;
+ ret = gfs2_trans_begin(sdp, rblocks, 0);
+ if (ret)
+ goto out_trans_fail;
+
+ lock_page(page);
+ ret = -EINVAL;
+ last_index = ip->i_inode.i_size >> PAGE_CACHE_SHIFT;
+ if (page->index > last_index)
+ goto out_unlock_page;
+ ret = 0;
+ if (!PageUptodate(page) || page->mapping != ip->i_inode.i_mapping)
+ goto out_unlock_page;
+ if (gfs2_is_stuffed(ip)) {
+ ret = gfs2_unstuff_dinode(ip, page);
+ if (ret)
+ goto out_unlock_page;
+ }
+ ret = gfs2_allocate_page_backing(page);
+
+out_unlock_page:
+ unlock_page(page);
+ gfs2_trans_end(sdp);
+out_trans_fail:
+ gfs2_inplace_release(ip);
+out_quota_unlock:
+ gfs2_quota_unlock(ip);
+out_alloc_put:
+ gfs2_alloc_put(ip);
+out_unlock:
+ gfs2_glock_dq(&gh);
+out:
+ gfs2_holder_uninit(&gh);
+ return ret;
+}
+
+static struct vm_operations_struct gfs2_vm_ops = {
+ .fault = filemap_fault,
+ .page_mkwrite = gfs2_page_mkwrite,
+};
+
/**
* gfs2_mmap -
return error;
}
- /* This is VM_MAYWRITE instead of VM_WRITE because a call
- to mprotect() can turn on VM_WRITE later. */
-
- if ((vma->vm_flags & (VM_MAYSHARE | VM_MAYWRITE)) ==
- (VM_MAYSHARE | VM_MAYWRITE))
- vma->vm_ops = &gfs2_vm_ops_sharewrite;
- else
- vma->vm_ops = &gfs2_vm_ops_private;
+ vma->vm_ops = &gfs2_vm_ops;
gfs2_glock_dq_uninit(&i_gh);
if (!(file->f_flags & O_LARGEFILE) &&
ip->i_di.di_size > MAX_NON_LFS) {
- error = -EFBIG;
+ error = -EOVERFLOW;
goto fail_gunlock;
}
}
/**
+ * gfs2_setlease - acquire/release a file lease
+ * @file: the file pointer
+ * @arg: lease type
+ * @fl: file lock
+ *
+ * Returns: errno
+ */
+
+static int gfs2_setlease(struct file *file, long arg, struct file_lock **fl)
+{
+ struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host);
+
+ /*
+ * We don't currently have a way to enforce a lease across the whole
+ * cluster; until we do, disable leases (by just returning -EINVAL),
+ * unless the administrator has requested purely local locking.
+ */
+ if (!sdp->sd_args.ar_localflocks)
+ return -EINVAL;
+ return generic_setlease(file, arg, fl);
+}
+
+static int gfs2_lm_plock_get(struct gfs2_sbd *sdp, struct lm_lockname *name,
+ struct file *file, struct file_lock *fl)
+{
+ int error = -EIO;
+ if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
+ error = sdp->sd_lockstruct.ls_ops->lm_plock_get(
+ sdp->sd_lockstruct.ls_lockspace, name, file, fl);
+ return error;
+}
+
+static int gfs2_lm_plock(struct gfs2_sbd *sdp, struct lm_lockname *name,
+ struct file *file, int cmd, struct file_lock *fl)
+{
+ int error = -EIO;
+ if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
+ error = sdp->sd_lockstruct.ls_ops->lm_plock(
+ sdp->sd_lockstruct.ls_lockspace, name, file, cmd, fl);
+ return error;
+}
+
+static int gfs2_lm_punlock(struct gfs2_sbd *sdp, struct lm_lockname *name,
+ struct file *file, struct file_lock *fl)
+{
+ int error = -EIO;
+ if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
+ error = sdp->sd_lockstruct.ls_ops->lm_punlock(
+ sdp->sd_lockstruct.ls_lockspace, name, file, fl);
+ return error;
+}
+
+/**
* gfs2_lock - acquire/release a posix lock on a file
* @file: the file pointer
* @cmd: either modify or retrieve lock state, possibly wait
struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host);
struct lm_lockname name =
- { .ln_number = ip->i_num.no_addr,
+ { .ln_number = ip->i_no_addr,
.ln_type = LM_TYPE_PLOCK };
if (!(fl->fl_flags & FL_POSIX))
return -ENOLCK;
- if ((ip->i_inode.i_mode & (S_ISGID | S_IXGRP)) == S_ISGID)
+ if (__mandatory_lock(&ip->i_inode))
return -ENOLCK;
- if (sdp->sd_args.ar_localflocks) {
- if (IS_GETLK(cmd)) {
- struct file_lock tmp;
- int ret;
- ret = posix_test_lock(file, fl, &tmp);
- fl->fl_type = F_UNLCK;
- if (ret)
- memcpy(fl, &tmp, sizeof(struct file_lock));
- return 0;
- } else {
- return posix_lock_file_wait(file, fl);
- }
+ if (cmd == F_CANCELLK) {
+ /* Hack: */
+ cmd = F_SETLK;
+ fl->fl_type = F_UNLCK;
}
-
if (IS_GETLK(cmd))
return gfs2_lm_plock_get(sdp, &name, file, fl);
else if (fl->fl_type == F_UNLCK)
int error = 0;
state = (fl->fl_type == F_WRLCK) ? LM_ST_EXCLUSIVE : LM_ST_SHARED;
- flags = (IS_SETLKW(cmd) ? 0 : LM_FLAG_TRY) | GL_EXACT | GL_NOCACHE;
+ flags = (IS_SETLKW(cmd) ? 0 : LM_FLAG_TRY) | GL_EXACT | GL_NOCACHE
+ | GL_FLOCK;
mutex_lock(&fp->f_fl_mutex);
if (gl) {
if (fl_gh->gh_state == state)
goto out;
- gfs2_glock_hold(gl);
flock_lock_file_wait(file,
&(struct file_lock){.fl_type = F_UNLCK});
- gfs2_glock_dq_uninit(fl_gh);
+ gfs2_glock_dq_wait(fl_gh);
+ gfs2_holder_reinit(state, flags, fl_gh);
} else {
error = gfs2_glock_get(GFS2_SB(&ip->i_inode),
- ip->i_num.no_addr, &gfs2_flock_glops,
+ ip->i_no_addr, &gfs2_flock_glops,
CREATE, &gl);
if (error)
goto out;
+ gfs2_holder_init(gl, state, flags, fl_gh);
+ gfs2_glock_put(gl);
}
-
- gfs2_holder_init(gl, state, flags, fl_gh);
- gfs2_glock_put(gl);
-
error = gfs2_glock_nq(fl_gh);
if (error) {
gfs2_holder_uninit(fl_gh);
static int gfs2_flock(struct file *file, int cmd, struct file_lock *fl)
{
struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
- struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host);
if (!(fl->fl_flags & FL_FLOCK))
return -ENOLCK;
- if ((ip->i_inode.i_mode & (S_ISGID | S_IXGRP)) == S_ISGID)
+ if (__mandatory_lock(&ip->i_inode))
return -ENOLCK;
- if (sdp->sd_args.ar_localflocks)
- return flock_lock_file_wait(file, fl);
-
if (fl->fl_type == F_UNLCK) {
do_unflock(file, fl);
return 0;
.release = gfs2_close,
.fsync = gfs2_fsync,
.lock = gfs2_lock,
- .sendfile = generic_file_sendfile,
.flock = gfs2_flock,
.splice_read = generic_file_splice_read,
.splice_write = generic_file_splice_write,
+ .setlease = gfs2_setlease,
};
const struct file_operations gfs2_dir_fops = {
.flock = gfs2_flock,
};
+const struct file_operations gfs2_file_fops_nolock = {
+ .llseek = gfs2_llseek,
+ .read = do_sync_read,
+ .aio_read = generic_file_aio_read,
+ .write = do_sync_write,
+ .aio_write = generic_file_aio_write,
+ .unlocked_ioctl = gfs2_ioctl,
+ .mmap = gfs2_mmap,
+ .open = gfs2_open,
+ .release = gfs2_close,
+ .fsync = gfs2_fsync,
+ .splice_read = generic_file_splice_read,
+ .splice_write = generic_file_splice_write,
+ .setlease = gfs2_setlease,
+};
+
+const struct file_operations gfs2_dir_fops_nolock = {
+ .readdir = gfs2_readdir,
+ .unlocked_ioctl = gfs2_ioctl,
+ .open = gfs2_open,
+ .release = gfs2_close,
+ .fsync = gfs2_fsync,
+};
+
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff