Release 4.10 fs/ceph/super.c

#include <linux/ceph/ceph_debug.h>

#include <linux/backing-dev.h>
#include <linux/ctype.h>
#include <linux/fs.h>
#include <linux/inet.h>
#include <linux/in6.h>
#include <linux/module.h>
#include <linux/mount.h>
#include <linux/parser.h>
#include <linux/sched.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/statfs.h>
#include <linux/string.h>

#include "super.h"
#include "mds_client.h"
#include "cache.h"

#include <linux/ceph/ceph_features.h>
#include <linux/ceph/decode.h>
#include <linux/ceph/mon_client.h>
#include <linux/ceph/auth.h>
#include <linux/ceph/debugfs.h>

/*
 * Ceph superblock operations
 *
 * Handle the basics of mounting, unmounting.
 */

/*
 * super ops
 */


static void ceph_put_super(struct super_block *s)
{
	struct ceph_fs_client *fsc = ceph_sb_to_client(s);

	dout("put_super\n");
	ceph_mdsc_close_sessions(fsc->mdsc);
}

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static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf)
{
	struct ceph_fs_client *fsc = ceph_inode_to_client(d_inode(dentry));
	struct ceph_monmap *monmap = fsc->client->monc.monmap;
	struct ceph_statfs st;
	u64 fsid;
	int err;

	dout("statfs\n");
	err = ceph_monc_do_statfs(&fsc->client->monc, &st);
	if (err < 0)
		return err;

	/* fill in kstatfs */
	buf->f_type = CEPH_SUPER_MAGIC;  /* ?? */

	/*
         * express utilization in terms of large blocks to avoid
         * overflow on 32-bit machines.
         *
         * NOTE: for the time being, we make bsize == frsize to humor
         * not-yet-ancient versions of glibc that are broken.
         * Someday, we will probably want to report a real block
         * size...  whatever that may mean for a network file system!
         */
	buf->f_bsize = 1 << CEPH_BLOCK_SHIFT;
	buf->f_frsize = 1 << CEPH_BLOCK_SHIFT;
	buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10);
	buf->f_bfree = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);
	buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10);

	buf->f_files = le64_to_cpu(st.num_objects);
	buf->f_ffree = -1;
	buf->f_namelen = NAME_MAX;

	/* leave fsid little-endian, regardless of host endianness */
	fsid = *(u64 *)(&monmap->fsid) ^ *((u64 *)&monmap->fsid + 1);
	buf->f_fsid.val[0] = fsid & 0xffffffff;
	buf->f_fsid.val[1] = fsid >> 32;

	return 0;
}


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static int ceph_sync_fs(struct super_block *sb, int wait)
{
	struct ceph_fs_client *fsc = ceph_sb_to_client(sb);

	if (!wait) {
		dout("sync_fs (non-blocking)\n");
		ceph_flush_dirty_caps(fsc->mdsc);
		dout("sync_fs (non-blocking) done\n");
		return 0;
	}

	dout("sync_fs (blocking)\n");
	ceph_osdc_sync(&fsc->client->osdc);
	ceph_mdsc_sync(fsc->mdsc);
	dout("sync_fs (blocking) done\n");
	return 0;
}

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/*
 * mount options
 */
enum {
	
Opt_wsize,
	
Opt_rsize,
	
Opt_rasize,
	
Opt_caps_wanted_delay_min,
	
Opt_caps_wanted_delay_max,
	
Opt_cap_release_safety,
	
Opt_readdir_max_entries,
	
Opt_readdir_max_bytes,
	
Opt_congestion_kb,
	
Opt_last_int,
	/* int args above */
	
Opt_snapdirname,
	
Opt_mds_namespace,
	
Opt_last_string,
	/* string args above */
	
Opt_dirstat,
	
Opt_nodirstat,
	
Opt_rbytes,
	
Opt_norbytes,
	
Opt_asyncreaddir,
	
Opt_noasyncreaddir,
	
Opt_dcache,
	
Opt_nodcache,
	
Opt_ino32,
	
Opt_noino32,
	
Opt_fscache,
	
Opt_nofscache,
	
Opt_poolperm,
	
Opt_nopoolperm,
	
Opt_require_active_mds,
	
Opt_norequire_active_mds,
#ifdef CONFIG_CEPH_FS_POSIX_ACL
	
Opt_acl,
#endif
	
Opt_noacl,
};


static match_table_t fsopt_tokens = {
	{Opt_wsize, "wsize=%d"},
	{Opt_rsize, "rsize=%d"},
	{Opt_rasize, "rasize=%d"},
	{Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"},
	{Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"},
	{Opt_cap_release_safety, "cap_release_safety=%d"},
	{Opt_readdir_max_entries, "readdir_max_entries=%d"},
	{Opt_readdir_max_bytes, "readdir_max_bytes=%d"},
	{Opt_congestion_kb, "write_congestion_kb=%d"},
	/* int args above */
	{Opt_snapdirname, "snapdirname=%s"},
	{Opt_mds_namespace, "mds_namespace=%s"},
	/* string args above */
	{Opt_dirstat, "dirstat"},
	{Opt_nodirstat, "nodirstat"},
	{Opt_rbytes, "rbytes"},
	{Opt_norbytes, "norbytes"},
	{Opt_asyncreaddir, "asyncreaddir"},
	{Opt_noasyncreaddir, "noasyncreaddir"},
	{Opt_dcache, "dcache"},
	{Opt_nodcache, "nodcache"},
	{Opt_ino32, "ino32"},
	{Opt_noino32, "noino32"},
	{Opt_fscache, "fsc"},
	{Opt_nofscache, "nofsc"},
	{Opt_poolperm, "poolperm"},
	{Opt_nopoolperm, "nopoolperm"},
	{Opt_require_active_mds, "require_active_mds"},
	{Opt_norequire_active_mds, "norequire_active_mds"},
#ifdef CONFIG_CEPH_FS_POSIX_ACL
	{Opt_acl, "acl"},
#endif
	{Opt_noacl, "noacl"},
	{-1, NULL}
};



static int parse_fsopt_token(char *c, void *private)
{
	struct ceph_mount_options *fsopt = private;
	substring_t argstr[MAX_OPT_ARGS];
	int token, intval, ret;

	token = match_token((char *)c, fsopt_tokens, argstr);
	if (token < 0)
		return -EINVAL;

	if (token < Opt_last_int) {
		ret = match_int(&argstr[0], &intval);
		if (ret < 0) {
			pr_err("bad mount option arg (not int) "
			       "at '%s'\n", c);
			return ret;
		}
		dout("got int token %d val %d\n", token, intval);
	} else if (token > Opt_last_int && token < Opt_last_string) {
		dout("got string token %d val %s\n", token,
		     argstr[0].from);
	} else {
		dout("got token %d\n", token);
	}

	switch (token) {
	case Opt_snapdirname:
		kfree(fsopt->snapdir_name);
		fsopt->snapdir_name = kstrndup(argstr[0].from,
					       argstr[0].to-argstr[0].from,
					       GFP_KERNEL);
		if (!fsopt->snapdir_name)
			return -ENOMEM;
		break;
	case Opt_mds_namespace:
		fsopt->mds_namespace = kstrndup(argstr[0].from,
						argstr[0].to-argstr[0].from,
						GFP_KERNEL);
		if (!fsopt->mds_namespace)
			return -ENOMEM;
		break;
		/* misc */
	case Opt_wsize:
		fsopt->wsize = intval;
		break;
	case Opt_rsize:
		fsopt->rsize = intval;
		break;
	case Opt_rasize:
		fsopt->rasize = intval;
		break;
	case Opt_caps_wanted_delay_min:
		fsopt->caps_wanted_delay_min = intval;
		break;
	case Opt_caps_wanted_delay_max:
		fsopt->caps_wanted_delay_max = intval;
		break;
	case Opt_readdir_max_entries:
		fsopt->max_readdir = intval;
		break;
	case Opt_readdir_max_bytes:
		fsopt->max_readdir_bytes = intval;
		break;
	case Opt_congestion_kb:
		fsopt->congestion_kb = intval;
		break;
	case Opt_dirstat:
		fsopt->flags |= CEPH_MOUNT_OPT_DIRSTAT;
		break;
	case Opt_nodirstat:
		fsopt->flags &= ~CEPH_MOUNT_OPT_DIRSTAT;
		break;
	case Opt_rbytes:
		fsopt->flags |= CEPH_MOUNT_OPT_RBYTES;
		break;
	case Opt_norbytes:
		fsopt->flags &= ~CEPH_MOUNT_OPT_RBYTES;
		break;
	case Opt_asyncreaddir:
		fsopt->flags &= ~CEPH_MOUNT_OPT_NOASYNCREADDIR;
		break;
	case Opt_noasyncreaddir:
		fsopt->flags |= CEPH_MOUNT_OPT_NOASYNCREADDIR;
		break;
	case Opt_dcache:
		fsopt->flags |= CEPH_MOUNT_OPT_DCACHE;
		break;
	case Opt_nodcache:
		fsopt->flags &= ~CEPH_MOUNT_OPT_DCACHE;
		break;
	case Opt_ino32:
		fsopt->flags |= CEPH_MOUNT_OPT_INO32;
		break;
	case Opt_noino32:
		fsopt->flags &= ~CEPH_MOUNT_OPT_INO32;
		break;
	case Opt_fscache:
		fsopt->flags |= CEPH_MOUNT_OPT_FSCACHE;
		break;
	case Opt_nofscache:
		fsopt->flags &= ~CEPH_MOUNT_OPT_FSCACHE;
		break;
	case Opt_poolperm:
		fsopt->flags &= ~CEPH_MOUNT_OPT_NOPOOLPERM;
		printk ("pool perm");
		break;
	case Opt_nopoolperm:
		fsopt->flags |= CEPH_MOUNT_OPT_NOPOOLPERM;
		break;
	case Opt_require_active_mds:
		fsopt->flags &= ~CEPH_MOUNT_OPT_MOUNTWAIT;
		break;
	case Opt_norequire_active_mds:
		fsopt->flags |= CEPH_MOUNT_OPT_MOUNTWAIT;
		break;
#ifdef CONFIG_CEPH_FS_POSIX_ACL
	case Opt_acl:
		fsopt->sb_flags |= MS_POSIXACL;
		break;
#endif
	case Opt_noacl:
		fsopt->sb_flags &= ~MS_POSIXACL;
		break;
	default:
		BUG_ON(token);
	}
	return 0;
}

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93
17.29%
4
30.77%
alex elder
alex elder
22
4.09%
1
7.69%
milosz tanski
milosz tanski
21
3.90%
1
7.69%
Total
538
100.00%
13
100.00%



static void destroy_mount_options(struct ceph_mount_options *args)
{
	dout("destroy_mount_options %p\n", args);
	kfree(args->snapdir_name);
	kfree(args->mds_namespace);
	kfree(args->server_path);
	kfree(args);
}

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zhen yan
14
31.82%
2
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44
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5
100.00%



static int strcmp_null(const char *s1, const char *s2)
{
	if (!s1 && !s2)
		return 0;
	if (s1 && !s2)
		return -1;
	if (!s1 && s2)
		return 1;
	return strcmp(s1, s2);
}

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static int compare_mount_options(struct ceph_mount_options *new_fsopt,
				 struct ceph_options *new_opt,
				 struct ceph_fs_client *fsc)
{
	struct ceph_mount_options *fsopt1 = new_fsopt;
	struct ceph_mount_options *fsopt2 = fsc->mount_options;
	int ofs = offsetof(struct ceph_mount_options, snapdir_name);
	int ret;

	ret = memcmp(fsopt1, fsopt2, ofs);
	if (ret)
		return ret;

	ret = strcmp_null(fsopt1->snapdir_name, fsopt2->snapdir_name);
	if (ret)
		return ret;
	ret = strcmp_null(fsopt1->mds_namespace, fsopt2->mds_namespace);
	if (ret)
		return ret;

	ret = strcmp_null(fsopt1->server_path, fsopt2->server_path);
	if (ret)
		return ret;

	return ceph_compare_options(new_opt, fsc->client);
}

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40.00%
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sage weil
24
17.27%
2
40.00%
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139
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static int parse_mount_options(struct ceph_mount_options **pfsopt,
			       struct ceph_options **popt,
			       int flags, char *options,
			       const char *dev_name)
{
	struct ceph_mount_options *fsopt;
	const char *dev_name_end;
	int err;

	if (!dev_name || !*dev_name)
		return -EINVAL;

	fsopt = kzalloc(sizeof(*fsopt), GFP_KERNEL);
	if (!fsopt)
		return -ENOMEM;

	dout("parse_mount_options %p, dev_name '%s'\n", fsopt, dev_name);

	fsopt->sb_flags = flags;
	fsopt->flags = CEPH_MOUNT_OPT_DEFAULT;

	fsopt->rsize = CEPH_RSIZE_DEFAULT;
	fsopt->rasize = CEPH_RASIZE_DEFAULT;
	fsopt->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL);
	if (!fsopt->snapdir_name) {
		err = -ENOMEM;
		goto out;
	}

	fsopt->caps_wanted_delay_min = CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT;
	fsopt->caps_wanted_delay_max = CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT;
	fsopt->cap_release_safety = CEPH_CAP_RELEASE_SAFETY_DEFAULT;
	fsopt->max_readdir = CEPH_MAX_READDIR_DEFAULT;
	fsopt->max_readdir_bytes = CEPH_MAX_READDIR_BYTES_DEFAULT;
	fsopt->congestion_kb = default_congestion_kb();

	/*
         * Distinguish the server list from the path in "dev_name".
         * Internally we do not include the leading '/' in the path.
         *
         * "dev_name" will look like:
         *     <server_spec>[,<server_spec>...]:[<path>]
         * where
         *     <server_spec> is <ip>[:<port>]
         *     <path> is optional, but if present must begin with '/'
         */
	dev_name_end = strchr(dev_name, '/');
	if (dev_name_end) {
		if (strlen(dev_name_end) > 1) {
			fsopt->server_path = kstrdup(dev_name_end, GFP_KERNEL);
			if (!fsopt->server_path) {
				err = -ENOMEM;
				goto out;
			}
		}
	} else {
		dev_name_end = dev_name + strlen(dev_name);
	}
	err = -EINVAL;
	dev_name_end--;		/* back up to ':' separator */
	if (dev_name_end < dev_name || *dev_name_end != ':') {
		pr_err("device name is missing path (no : separator in %s)\n",
				dev_name);
		goto out;
	}
	dout("device name '%.*s'\n", (int)(dev_name_end - dev_name), dev_name);
	if (fsopt->server_path)
		dout("server path '%s'\n", fsopt->server_path);

	*popt = ceph_parse_options(options, dev_name, dev_name_end,
				 parse_fsopt_token, (void *)fsopt);
	if (IS_ERR(*popt)) {
		err = PTR_ERR(*popt);
		goto out;
	}

	/* success */
	*pfsopt = fsopt;
	return 0;

out:
	destroy_mount_options(fsopt);
	return err;
}

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45
12.30%
2
18.18%
sanidhya kashyap
sanidhya kashyap
17
4.64%
1
9.09%
sasha levin
sasha levin
4
1.09%
1
9.09%
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366
100.00%
11
100.00%

/**
 * ceph_show_options - Show mount options in /proc/mounts
 * @m: seq_file to write to
 * @root: root of that (sub)tree
 */


static int ceph_show_options(struct seq_file *m, struct dentry *root)
{
	struct ceph_fs_client *fsc = ceph_sb_to_client(root->d_sb);
	struct ceph_mount_options *fsopt = fsc->mount_options;
	size_t pos;
	int ret;

	/* a comma between MNT/MS and client options */
	seq_putc(m, ',');
	pos = m->count;

	ret = ceph_print_client_options(m, fsc->client);
	if (ret)
		return ret;

	/* retract our comma if no client options */
	if (m->count == pos)
		m->count--;

	if (fsopt->flags & CEPH_MOUNT_OPT_DIRSTAT)
		seq_puts(m, ",dirstat");
	if ((fsopt->flags & CEPH_MOUNT_OPT_RBYTES))
		seq_puts(m, ",rbytes");
	if (fsopt->flags & CEPH_MOUNT_OPT_NOASYNCREADDIR)
		seq_puts(m, ",noasyncreaddir");
	if ((fsopt->flags & CEPH_MOUNT_OPT_DCACHE) == 0)
		seq_puts(m, ",nodcache");
	if (fsopt->flags & CEPH_MOUNT_OPT_FSCACHE)
		seq_puts(m, ",fsc");
	if (fsopt->flags & CEPH_MOUNT_OPT_NOPOOLPERM)
		seq_puts(m, ",nopoolperm");

#ifdef CONFIG_CEPH_FS_POSIX_ACL
	if (fsopt->sb_flags & MS_POSIXACL)
		seq_puts(m, ",acl");
	else
		seq_puts(m, ",noacl");
#endif

	if (fsopt->mds_namespace)
		seq_printf(m, ",mds_namespace=%s", fsopt->mds_namespace);
	if (fsopt->wsize)
		seq_printf(m, ",wsize=%d", fsopt->wsize);
	if (fsopt->rsize != CEPH_RSIZE_DEFAULT)
		seq_printf(m, ",rsize=%d", fsopt->rsize);
	if (fsopt->rasize != CEPH_RASIZE_DEFAULT)
		seq_printf(m, ",rasize=%d", fsopt->rasize);
	if (fsopt->congestion_kb != default_congestion_kb())
		seq_printf(m, ",write_congestion_kb=%d", fsopt->congestion_kb);
	if (fsopt->caps_wanted_delay_min != CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT)
		seq_printf(m, ",caps_wanted_delay_min=%d",
			 fsopt->caps_wanted_delay_min);
	if (fsopt->caps_wanted_delay_max != CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT)
		seq_printf(m, ",caps_wanted_delay_max=%d",
			   fsopt->caps_wanted_delay_max);
	if (fsopt->cap_release_safety != CEPH_CAP_RELEASE_SAFETY_DEFAULT)
		seq_printf(m, ",cap_release_safety=%d",
			   fsopt->cap_release_safety);
	if (fsopt->max_readdir != CEPH_MAX_READDIR_DEFAULT)
		seq_printf(m, ",readdir_max_entries=%d", fsopt->max_readdir);
	if (fsopt->max_readdir_bytes != CEPH_MAX_READDIR_BYTES_DEFAULT)
		seq_printf(m, ",readdir_max_bytes=%d", fsopt->max_readdir_bytes);
	if (strcmp(fsopt->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT))
		seq_show_option(m, "snapdirname", fsopt->snapdir_name);

	return 0;
}

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12
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ilya dryomov
33
7.76%
3
12.50%
zhen yan
zhen yan
33
7.76%
4
16.67%
milosz tanski
milosz tanski
15
3.53%
1
4.17%
al viro
al viro
4
0.94%
1
4.17%
kees cook
kees cook
2
0.47%
1
4.17%
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425
100.00%
24
100.00%

/*
 * handle any mon messages the standard library doesn't understand.
 * return error if we don't either.
 */


static int extra_mon_dispatch(struct ceph_client *client, struct ceph_msg *msg)
{
	struct ceph_fs_client *fsc = client->private;
	int type = le16_to_cpu(msg->hdr.type);

	switch (type) {
	case CEPH_MSG_MDS_MAP:
		ceph_mdsc_handle_mdsmap(fsc->mdsc, msg);
		return 0;
	case CEPH_MSG_FS_MAP_USER:
		ceph_mdsc_handle_fsmap(fsc->mdsc, msg);
		return 0;
	default:
		return -1;
	}
}

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20.00%
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60.00%
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/*
 * create a new fs client
 */


static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt,
					struct ceph_options *opt)
{
	struct ceph_fs_client *fsc;
	const u64 supported_features =
		CEPH_FEATURE_FLOCK | CEPH_FEATURE_DIRLAYOUTHASH |
		CEPH_FEATURE_MDSENC | CEPH_FEATURE_MDS_INLINE_DATA;
	const u64 required_features = 0;
	int page_count;
	size_t size;
	int err = -ENOMEM;

	fsc = kzalloc(sizeof(*fsc), GFP_KERNEL);
	if (!fsc)
		return ERR_PTR(-ENOMEM);

	fsc->client = ceph_create_client(opt, fsc, supported_features,
					 required_features);
	if (IS_ERR(fsc->client)) {
		err = PTR_ERR(fsc->client);
		goto fail;
	}
	fsc->client->extra_mon_dispatch = extra_mon_dispatch;

	if (fsopt->mds_namespace == NULL) {
		ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_MDSMAP,
				   0, true);
	} else {
		ceph_monc_want_map(&fsc->client->monc, CEPH_SUB_FSMAP,
				   0, false);
	}

	fsc->mount_options = fsopt;

	fsc->sb = NULL;
	fsc->mount_state = CEPH_MOUNT_MOUNTING;

	atomic_long_set(&fsc->writeback_count, 0);

	err = bdi_init(&fsc->backing_dev_info);
	if (err < 0)
		goto fail_client;

	err = -ENOMEM;
	/*
         * The number of concurrent works can be high but they don't need
         * to be processed in parallel, limit concurrency.
         */
	fsc->wb_wq = alloc_workqueue("ceph-writeback", 0, 1);
	if (fsc->wb_wq == NULL)
		goto fail_bdi;
	fsc->pg_inv_wq = alloc_workqueue("ceph-pg-invalid", 0, 1);
	if (fsc->pg_inv_wq == NULL)
		goto fail_wb_wq;
	fsc->trunc_wq = alloc_workqueue("ceph-trunc", 0, 1);
	if (fsc->trunc_wq == NULL)
		goto fail_pg_inv_wq;

	/* set up mempools */
	err = -ENOMEM;
	page_count = fsc->mount_options->wsize >> PAGE_SHIFT;
	size = sizeof (struct page *) * (page_count ? page_count : 1);
	fsc->wb_pagevec_pool = mempool_create_kmalloc_pool(10, size);
	if (!fsc->wb_pagevec_pool)
		goto fail_trunc_wq;

	/* setup fscache */
	if ((fsopt->flags & CEPH_MOUNT_OPT_FSCACHE) &&
	    (ceph_fscache_register_fs(fsc) != 0))
		goto fail_fscache;

	/* caps */
	fsc->min_caps = fsopt->max_readdir;

	return fsc;

fail_fscache:
	ceph_fscache_unregister_fs(fsc);
fail_trunc_wq:
	destroy_workqueue(fsc->trunc_wq);
fail_pg_inv_wq:
	destroy_workqueue(fsc->pg_inv_wq);
fail_wb_wq:
	destroy_workqueue(fsc->wb_wq);
fail_bdi:
	bdi_destroy(&fsc->backing_dev_info);
fail_client:
	ceph_destroy_client(fsc->client);
fail:
	kfree(fsc);
	return ERR_PTR(err);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
sage weil
sage weil
196
43.65%
6
31.58%
yehuda sadeh
yehuda sadeh
126
28.06%
2
10.53%
zhen yan
zhen yan
35
7.80%
4
21.05%
alex elder
alex elder
34
7.57%
1
5.26%
milosz tanski
milosz tanski
30
6.68%
1
5.26%
tejun heo
tejun heo
16
3.56%
1
5.26%
ilya dryomov
ilya dryomov
10
2.23%
2
10.53%
kirill a. shutemov
kirill a. shutemov
1
0.22%
1
5.26%
h hartley sweeten
h hartley sweeten
1
0.22%
1
5.26%
Total
449
100.00%
19
100.00%



static void destroy_fs_client(struct ceph_fs_client *fsc)
{
	dout("destroy_fs_client %p\n", fsc);

	ceph_fscache_unregister_fs(fsc);

	destroy_workqueue(fsc->wb_wq);
	destroy_workqueue(fsc->pg_inv_wq);
	destroy_workqueue(fsc->trunc_wq);

	bdi_destroy(&fsc->backing_dev_info);

	mempool_destroy(fsc->wb_pagevec_pool);

	destroy_mount_options(fsc->mount_options);

	ceph_fs_debugfs_cleanup(fsc);

	ceph_destroy_client(fsc->client);

	kfree(fsc);
	dout("destroy_fs_client %p done\n", fsc);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
yehuda sadeh
yehuda sadeh
45
50.00%
1
20.00%
sage weil
sage weil
39
43.33%
2
40.00%
milosz tanski
milosz tanski
5
5.56%
1
20.00%
h hartley sweeten
h hartley sweeten
1
1.11%
1
20.00%
Total
90
100.00%
5
100.00%

/*
 * caches
 */

struct kmem_cache *ceph_inode_cachep;

struct kmem_cache *ceph_cap_cachep;

struct kmem_cache *ceph_cap_flush_cachep;

struct kmem_cache *ceph_dentry_cachep;

struct kmem_cache *ceph_file_cachep;



static void ceph_inode_init_once(void *foo)
{
	struct ceph_inode_info *ci = foo;
	inode_init_once(&ci->vfs_inode);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
yehuda sadeh
yehuda sadeh
22
88.00%
1
50.00%
sage weil
sage weil
3
12.00%
1
50.00%
Total
25
100.00%
2
100.00%



static int __init init_caches(void)
{
	int error = -ENOMEM;

	ceph_inode_cachep = kmem_cache_create("ceph_inode_info",
				      sizeof(struct ceph_inode_info),
				      __alignof__(struct ceph_inode_info),
				      SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD|
				      SLAB_ACCOUNT, ceph_inode_init_once);
	if (ceph_inode_cachep == NULL)
		return -ENOMEM;

	ceph_cap_cachep = KMEM_CACHE(ceph_cap,
				     SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
	if (ceph_cap_cachep == NULL)
		goto bad_cap;
	ceph_cap_flush_cachep = KMEM_CACHE(ceph_cap_flush,
					   SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
	if (ceph_cap_flush_cachep == NULL)
		goto bad_cap_flush;

	ceph_dentry_cachep = KMEM_CACHE(ceph_dentry_info,
					SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD);
	if (ceph_dentry_cachep == NULL)
		goto bad_dentry;

	ceph_file_cachep = KMEM_CACHE(ceph_file_info, SLAB_MEM_SPREAD);

	if (ceph_file_cachep == NULL)
		goto bad_file;

	if ((error = ceph_fscache_register()))
		goto bad_file;

	return 0;
bad_file:
	kmem_cache_destroy(ceph_dentry_cachep);
bad_dentry:
	kmem_cache_destroy(ceph_cap_flush_cachep);
bad_cap_flush:
	kmem_cache_destroy(ceph_cap_cachep);
bad_cap:
	kmem_cache_destroy(ceph_inode_cachep);
	return error;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
yehuda sadeh
yehuda sadeh
107
60.80%
1
16.67%
zhen yan
zhen yan
27
15.34%
1
16.67%
sage weil
sage weil
21
11.93%
2
33.33%
milosz tanski
milosz tanski
19
10.80%
1
16.67%
vladimir davydov
vladimir davydov
2
1.14%
1
16.67%
Total
176
100.00%
6
100.00%



static void destroy_caches(void)
{
	/*
         * Make sure all delayed rcu free inodes are flushed before we
         * destroy cache.
         */
	rcu_barrier();

	kmem_cache_destroy(ceph_inode_cachep);
	kmem_cache_destroy(ceph_cap_cachep);
	kmem_cache_destroy(ceph_cap_flush_cachep);
	kmem_cache_destroy(ceph_dentry_cachep);
	kmem_cache_destroy(ceph_file_cachep);

	ceph_fscache_unregister();
}


Contributors
Person
Tokens
Prop
Commits
CommitProp
sage weil
sage weil
16
40.00%
2
33.33%
yehuda sadeh
yehuda sadeh
12
30.00%
1
16.67%
zhen yan
zhen yan
5
12.50%
1
16.67%
kirill a. shutemov
kirill a. shutemov
4
10.00%
1
16.67%
milosz tanski
milosz tanski
3
7.50%
1
16.67%
Total
40
100.00%
6
100.00%

/*
 * ceph_umount_begin - initiate forced umount.  Tear down down the
 * mount, skipping steps that may hang while waiting for server(s).
 */


static void ceph_umount_begin(struct super_block *sb)
{
	struct ceph_fs_client *fsc = ceph_sb_to_client(sb);

	dout("ceph_umount_begin - starting forced umount\n");
	if (!fsc)
		return;
	fsc->mount_state = CEPH_MOUNT_SHUTDOWN;
	ceph_mdsc_force_umount(fsc->mdsc);
	return;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
yehuda sadeh
yehuda sadeh
32
69.57%
1
33.33%
sage weil
sage weil
7
15.22%
1
33.33%
zhen yan
zhen yan
7
15.22%
1
33.33%
Total
46
100.00%
3
100.00%


static const struct super_operations ceph_super_ops = {
	.alloc_inode	= ceph_alloc_inode,
	.destroy_inode	= ceph_destroy_inode,
	.write_inode    = ceph_write_inode,
	.drop_inode	= ceph_drop_inode,
	.evict_inode	= ceph_evict_inode,
	.sync_fs        = ceph_sync_fs,
	.put_super	= ceph_put_super,
	.show_options   = ceph_show_options,
	.statfs		= ceph_statfs,
	.umount_begin   = ceph_umount_begin,
};

/*
 * Bootstrap mount by opening the root directory.  Note the mount
 * @started time from caller, and time out if this takes too long.
 */


static struct dentry *open_root_dentry(struct ceph_fs_client *fsc,
				       const char *path,
				       unsigned long started)
{
	struct ceph_mds_client *mdsc = fsc->mdsc;
	struct ceph_mds_request *req = NULL;
	int err;
	struct dentry *root;

	/* open dir */
	dout("open_root_inode opening '%s'\n", path);
	req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETATTR, USE_ANY_MDS);
	if (IS_ERR(req))
		return ERR_CAST(req);
	req->r_path1 = kstrdup(path, GFP_NOFS);
	if (!req->r_path1) {
		root = ERR_PTR(-ENOMEM);
		goto out;
	}

	req->r_ino1.ino = CEPH_INO_ROOT;
	req->r_ino1.snap = CEPH_NOSNAP;
	req->r_started = started;
	req->r_timeout = fsc->client->options->mount_timeout;
	req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE);
	req->r_num_caps = 2;
	err = ceph_mdsc_do_request(mdsc, NULL, req);
	if (err == 0) {
		struct inode *inode = req->r_target_inode;
		req->r_target_inode = NULL;
		dout("open_root_inode success\n");
		root = d_make_root(inode);
		if (!root) {
			root = ERR_PTR(-ENOMEM);
			goto out;
		}
		dout("open_root_inode success, root dentry is %p\n", root);
	} else {
		root = ERR_PTR(err);
	}
out:
	ceph_mdsc_put_request(req);
	return root;
}




Contributors
Person
Tokens
Prop
Commits
CommitProp
sage weil
sage weil
189
74.70%
2
28.57%
al viro
al viro
37
14.62%
2
28.57%
sanidhya kashyap
sanidhya kashyap
20
7.91%
1
14.29%
yehuda sadeh
yehuda sadeh
6
2.37%
1
14.29%
julia lawall
julia lawall
1
0.40%
1
14.29%
Total
253
100.00%
7
100.00%

/*
 * mount: join the ceph cluster, and open root directory.
 */


static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc)
{
	int err;
	unsigned long started = jiffies;  /* note the start time */
	struct dentry *root;
	int first = 0;   /* first vfsmount for this super_block */

	dout("mount start %p\n", fsc);
	mutex_lock(&fsc->client->mount_mutex);

	if (!fsc->sb->s_root) {
		const char *path;
		err = __ceph_open_session(fsc->client, started);
		if (err < 0)
			goto out;

		if (!fsc->mount_options->server_path) {
			path = "";
			dout("mount opening path \\t\n");
		} else {
			path = fsc->mount_options->server_path + 1;
			dout("mount opening path %s\n", path);
		}
		root = open_root_dentry(fsc, path, started);
		if (IS_ERR(root)) {
			err = PTR_ERR(root);
			goto out;
		}
		fsc->sb->s_root = dget(root);
		first = 1;

		err = ceph_fs_debugfs_init(fsc);
		if (err < 0)
			goto fail;
	} else {
		root = dget(fsc->sb->s_root);
	}

	fsc->mount_state = CEPH_MOUNT_MOUNTED;
	dout("mount success\n");
	mutex_unlock(&fsc->client->mount_mutex);
	return root;

fail:
	if (first) {
		dput(fsc->sb->s_root);
		fsc->sb->s_root = NULL;
	}
out:
	mutex_unlock(&fsc->client->mount_mutex);
	return ERR_PTR(err);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
sage weil
sage weil
100
37.17%
1
12.50%
zhen yan
zhen yan
93
34.57%
3
37.50%
yehuda sadeh
yehuda sadeh
46
17.10%
2
25.00%
al viro
al viro
16
5.95%
1
12.50%
geert uytterhoeven
geert uytterhoeven
14
5.20%
1
12.50%
Total
269
100.00%
8
100.00%



static int ceph_set_super(struct super_block *s, void *data)
{
	struct ceph_fs_client *fsc = data;
	int ret;

	dout("set_super %p data %p\n", s, data);

	s->s_flags = fsc->mount_options->sb_flags;
	s->s_maxbytes = 1ULL << 40;  /* temp value until we get mdsmap */

	s->s_xattr = ceph_xattr_handlers;
	s->s_fs_info = fsc;
	fsc->sb = s;

	s->s_op = &ceph_super_ops;
	s->s_d_op = &ceph_dentry_ops;
	s->s_export_op = &ceph_export_ops;

	s->s_time_gran = 1000;  /* 1000 ns == 1 us */

	ret = set_anon_super(s, NULL);  /* what is that second arg for? */
	if (ret != 0)
		goto fail;

	return ret;

fail:
	s->s_fs_info = NULL;
	fsc->sb = NULL;
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
sage weil
sage weil
118
85.51%
2
40.00%
yehuda sadeh
yehuda sadeh
7
5.07%
1
20.00%
al viro
al viro
7
5.07%
1
20.00%
guangliang zhao
guangliang zhao
6
4.35%
1
20.00%
Total
138
100.00%
5
100.00%

/*
 * share superblock if same fs AND options
 */


static int ceph_compare_super(struct super_block *sb, void *data)
{
	struct ceph_fs_client *new = data;
	struct ceph_mount_options *fsopt = new->mount_options;
	struct ceph_options *opt = new->client->options;
	struct ceph_fs_client *other = ceph_sb_to_client(sb);

	dout("ceph_compare_super %p\n", sb);

	if (compare_mount_options(fsopt, opt, other)) {
		dout("monitor(s)/mount options don't match\n");
		return 0;
	}
	if ((opt->flags & CEPH_OPT_FSID) &&
	    ceph_fsid_compare(&opt->fsid, &other->client->fsid)) {
		dout("fsid doesn't match\n");
		return 0;
	}
	if (fsopt->sb_flags != other->mount_options->sb_flags) {
		dout("flags differ\n");
		return 0;
	}
	return 1;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
sage weil
sage weil
101
72.14%
2
66.67%
yehuda sadeh
yehuda sadeh
39
27.86%
1
33.33%
Total
140
100.00%
3
100.00%

/*
 * construct our own bdi so we can control readahead, etc.
 */

static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0);



static int ceph_register_bdi(struct super_block *sb,
			     struct ceph_fs_client *fsc)
{
	int err;

	/* set ra_pages based on rasize mount option? */
	if (fsc->mount_options->rasize >= PAGE_SIZE)
		fsc->backing_dev_info.ra_pages =
			(fsc->mount_options->rasize + PAGE_SIZE - 1)
			>> PAGE_SHIFT;
	else
		fsc->backing_dev_info.ra_pages =
			VM_MAX_READAHEAD * 1024 / PAGE_SIZE;

	err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%ld",
			   atomic_long_inc_return(&bdi_seq));
	if (!err)
		sb->s_bdi = &fsc->backing_dev_info;
	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
sage weil
sage weil
75
75.00%
6
54.55%
yehuda sadeh
yehuda sadeh
17
17.00%
2
18.18%
christoph hellwig
christoph hellwig
4
4.00%
1
9.09%
kirill a. shutemov
kirill a. shutemov
3
3.00%
1
9.09%
joe perches
joe perches
1
1.00%
1
9.09%
Total
100
100.00%
11
100.00%



static struct dentry *ceph_mount(struct file_system_type *fs_type,
		       int flags, const char *dev_name, void *data)
{
	struct super_block *sb;
	struct ceph_fs_client *fsc;
	struct dentry *res;
	int err;
	int (*compare_super)(struct super_block *, void *) = ceph_compare_super;
	struct ceph_mount_options *fsopt = NULL;
	struct ceph_options *opt = NULL;

	dout("ceph_mount\n");

#ifdef CONFIG_CEPH_FS_POSIX_ACL
	flags |= MS_POSIXACL;
#endif
	err = parse_mount_options(&fsopt, &opt, flags, data, dev_name);
	if (err < 0) {
		res = ERR_PTR(err);
		goto out_final;
	}

	/* create client (which we may/may not use) */
	fsc = create_fs_client(fsopt, opt);
	if (IS_ERR(fsc)) {
		res = ERR_CAST(fsc);
		destroy_mount_options(fsopt);
		ceph_destroy_options(opt);
		goto out_final;
	}

	err = ceph_mdsc_init(fsc);
	if (err < 0) {
		res = ERR_PTR(err);
		goto out;
	}

	if (ceph_test_opt(fsc->client, NOSHARE))
		compare_super = NULL;
	sb = sget(fs_type, compare_super, ceph_set_super, flags, fsc);
	if (IS_ERR(sb)) {
		res = ERR_CAST(sb);
		goto out;
	}

	if (ceph_sb_to_client(sb) != fsc) {
		ceph_mdsc_destroy(fsc);
		destroy_fs_client(fsc);
		fsc = ceph_sb_to_client(sb);
		dout("get_sb got existing client %p\n", fsc);
	} else {
		dout("get_sb using new client %p\n", fsc);
		err = ceph_register_bdi(sb, fsc);
		if (err < 0) {
			res = ERR_PTR(err);
			goto out_splat;
		}
	}

	res = ceph_real_mount(fsc);
	if (IS_ERR(res))
		goto out_splat;
	dout("root %p inode %p ino %llx.%llx\n", res,
	     d_inode(res), ceph_vinop(d_inode(res)));
	return res;

out_splat:
	ceph_mdsc_close_sessions(fsc->mdsc);
	deactivate_locked_super(sb);
	goto out_final;

out:
	ceph_mdsc_destroy(fsc);
	destroy_fs_client(fsc);
out_final:
	dout("ceph_mount fail %ld\n", PTR_ERR(res));
	return res;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
sage weil
sage weil
239
61.13%
4
36.36%
yehuda sadeh
yehuda sadeh
84
21.48%
1
9.09%
al viro
al viro
56
14.32%
2
18.18%
david howells
david howells
8
2.05%
2
18.18%
noah watkins
noah watkins
2
0.51%
1
9.09%
cheng renquan
cheng renquan
2
0.51%
1
9.09%
Total
391
100.00%
11
100.00%



static void ceph_kill_sb(struct super_block *s)
{
	struct ceph_fs_client *fsc = ceph_sb_to_client(s);
	dev_t dev = s->s_dev;

	dout("kill_sb %p\n", s);

	ceph_mdsc_pre_umount(fsc->mdsc);
	generic_shutdown_super(s);
	ceph_mdsc_destroy(fsc);

	destroy_fs_client(fsc);
	free_anon_bdev(dev);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
sage weil
sage weil
39
62.90%
2
50.00%
christoph hellwig
christoph hellwig
13
20.97%
1
25.00%
yehuda sadeh
yehuda sadeh
10
16.13%
1
25.00%
Total
62
100.00%
4
100.00%


static struct file_system_type ceph_fs_type = {
	.owner		= THIS_MODULE,
	.name		= "ceph",
	.mount		= ceph_mount,
	.kill_sb	= ceph_kill_sb,
	.fs_flags	= FS_RENAME_DOES_D_MOVE,
};
MODULE_ALIAS_FS("ceph");



static int __init init_ceph(void)
{
	int ret = init_caches();
	if (ret)
		goto out;

	ceph_flock_init();
	ceph_xattr_init();
	ret = register_filesystem(&ceph_fs_type);
	if (ret)
		goto out_xattr;

	pr_info("loaded (mds proto %d)\n", CEPH_MDSC_PROTOCOL);

	return 0;

out_xattr:
	ceph_xattr_exit();
	destroy_caches();
out:
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
sage weil
sage weil
52
78.79%
2
28.57%
alex elder
alex elder
6
9.09%
1
14.29%
zheng yan
zheng yan
3
4.55%
1
14.29%
yehuda sadeh
yehuda sadeh
3
4.55%
1
14.29%
zhen yan
zhen yan
1
1.52%
1
14.29%
ilya dryomov
ilya dryomov
1
1.52%
1
14.29%
Total
66
100.00%
7
100.00%



static void __exit exit_ceph(void)
{
	dout("exit_ceph\n");
	unregister_filesystem(&ceph_fs_type);
	ceph_xattr_exit();
	destroy_caches();
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
sage weil
sage weil
23
88.46%
1
50.00%
alex elder
alex elder
3
11.54%
1
50.00%
Total
26
100.00%
2
100.00%


module_init(init_ceph);

module_exit(exit_ceph);

MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
MODULE_DESCRIPTION("Ceph filesystem for Linux");
MODULE_LICENSE("GPL");
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
sage weil
sage weil
2153
45.06%
31
33.33%
yehuda sadeh
yehuda sadeh
1598
33.44%
6
6.45%
zhen yan
zhen yan
460
9.63%
14
15.05%
alex elder
alex elder
145
3.03%
5
5.38%
al viro
al viro
123
2.57%
6
6.45%
milosz tanski
milosz tanski
112
2.34%
1
1.08%
ilya dryomov
ilya dryomov
44
0.92%
6
6.45%
sanidhya kashyap
sanidhya kashyap
37
0.77%
1
1.08%
tejun heo
tejun heo
19
0.40%
2
2.15%
christoph hellwig
christoph hellwig
17
0.36%
2
2.15%
geert uytterhoeven
geert uytterhoeven
14
0.29%
1
1.08%
david howells
david howells
11
0.23%
2
2.15%
kirill a. shutemov
kirill a. shutemov
8
0.17%
2
2.15%
zheng yan
zheng yan
8
0.17%
2
2.15%
guangliang zhao
guangliang zhao
6
0.13%
1
1.08%
eric w. biederman
eric w. biederman
5
0.10%
1
1.08%
sasha levin
sasha levin
4
0.08%
1
1.08%
h hartley sweeten
h hartley sweeten
2
0.04%
1
1.08%
vladimir davydov
vladimir davydov
2
0.04%
1
1.08%
cheng renquan
cheng renquan
2
0.04%
1
1.08%
noah watkins
noah watkins
2
0.04%
1
1.08%
kees cook
kees cook
2
0.04%
1
1.08%
joe perches
joe perches
1
0.02%
1
1.08%
jeff mahoney
jeff mahoney
1
0.02%
1
1.08%
julia lawall
julia lawall
1
0.02%
1
1.08%
greg farnum
greg farnum
1
0.02%
1
1.08%
Total
4778
100.00%
93
100.00%
Directory: fs/ceph

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