| /* |
| * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
| * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
| * |
| * This copyrighted material is made available to anyone wishing to use, |
| * modify, copy, or redistribute it subject to the terms and conditions |
| * of the GNU General Public License version 2. |
| */ |
| |
| #include <linux/slab.h> |
| #include <linux/spinlock.h> |
| #include <linux/completion.h> |
| #include <linux/buffer_head.h> |
| #include <linux/xattr.h> |
| #include <linux/gfs2_ondisk.h> |
| #include <linux/posix_acl_xattr.h> |
| #include <linux/uaccess.h> |
| |
| #include "gfs2.h" |
| #include "incore.h" |
| #include "acl.h" |
| #include "xattr.h" |
| #include "glock.h" |
| #include "inode.h" |
| #include "meta_io.h" |
| #include "quota.h" |
| #include "rgrp.h" |
| #include "super.h" |
| #include "trans.h" |
| #include "util.h" |
| |
| /** |
| * ea_calc_size - returns the acutal number of bytes the request will take up |
| * (not counting any unstuffed data blocks) |
| * @sdp: |
| * @er: |
| * @size: |
| * |
| * Returns: 1 if the EA should be stuffed |
| */ |
| |
| static int ea_calc_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize, |
| unsigned int *size) |
| { |
| unsigned int jbsize = sdp->sd_jbsize; |
| |
| /* Stuffed */ |
| *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize + dsize, 8); |
| |
| if (*size <= jbsize) |
| return 1; |
| |
| /* Unstuffed */ |
| *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize + |
| (sizeof(__be64) * DIV_ROUND_UP(dsize, jbsize)), 8); |
| |
| return 0; |
| } |
| |
| static int ea_check_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize) |
| { |
| unsigned int size; |
| |
| if (dsize > GFS2_EA_MAX_DATA_LEN) |
| return -ERANGE; |
| |
| ea_calc_size(sdp, nsize, dsize, &size); |
| |
| /* This can only happen with 512 byte blocks */ |
| if (size > sdp->sd_jbsize) |
| return -ERANGE; |
| |
| return 0; |
| } |
| |
| typedef int (*ea_call_t) (struct gfs2_inode *ip, struct buffer_head *bh, |
| struct gfs2_ea_header *ea, |
| struct gfs2_ea_header *prev, void *private); |
| |
| static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh, |
| ea_call_t ea_call, void *data) |
| { |
| struct gfs2_ea_header *ea, *prev = NULL; |
| int error = 0; |
| |
| if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_EA)) |
| return -EIO; |
| |
| for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) { |
| if (!GFS2_EA_REC_LEN(ea)) |
| goto fail; |
| if (!(bh->b_data <= (char *)ea && (char *)GFS2_EA2NEXT(ea) <= |
| bh->b_data + bh->b_size)) |
| goto fail; |
| if (!GFS2_EATYPE_VALID(ea->ea_type)) |
| goto fail; |
| |
| error = ea_call(ip, bh, ea, prev, data); |
| if (error) |
| return error; |
| |
| if (GFS2_EA_IS_LAST(ea)) { |
| if ((char *)GFS2_EA2NEXT(ea) != |
| bh->b_data + bh->b_size) |
| goto fail; |
| break; |
| } |
| } |
| |
| return error; |
| |
| fail: |
| gfs2_consist_inode(ip); |
| return -EIO; |
| } |
| |
| static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data) |
| { |
| struct buffer_head *bh, *eabh; |
| __be64 *eablk, *end; |
| int error; |
| |
| error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0, &bh); |
| if (error) |
| return error; |
| |
| if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) { |
| error = ea_foreach_i(ip, bh, ea_call, data); |
| goto out; |
| } |
| |
| if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_IN)) { |
| error = -EIO; |
| goto out; |
| } |
| |
| eablk = (__be64 *)(bh->b_data + sizeof(struct gfs2_meta_header)); |
| end = eablk + GFS2_SB(&ip->i_inode)->sd_inptrs; |
| |
| for (; eablk < end; eablk++) { |
| u64 bn; |
| |
| if (!*eablk) |
| break; |
| bn = be64_to_cpu(*eablk); |
| |
| error = gfs2_meta_read(ip->i_gl, bn, DIO_WAIT, 0, &eabh); |
| if (error) |
| break; |
| error = ea_foreach_i(ip, eabh, ea_call, data); |
| brelse(eabh); |
| if (error) |
| break; |
| } |
| out: |
| brelse(bh); |
| return error; |
| } |
| |
| struct ea_find { |
| int type; |
| const char *name; |
| size_t namel; |
| struct gfs2_ea_location *ef_el; |
| }; |
| |
| static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh, |
| struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, |
| void *private) |
| { |
| struct ea_find *ef = private; |
| |
| if (ea->ea_type == GFS2_EATYPE_UNUSED) |
| return 0; |
| |
| if (ea->ea_type == ef->type) { |
| if (ea->ea_name_len == ef->namel && |
| !memcmp(GFS2_EA2NAME(ea), ef->name, ea->ea_name_len)) { |
| struct gfs2_ea_location *el = ef->ef_el; |
| get_bh(bh); |
| el->el_bh = bh; |
| el->el_ea = ea; |
| el->el_prev = prev; |
| return 1; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int gfs2_ea_find(struct gfs2_inode *ip, int type, const char *name, |
| struct gfs2_ea_location *el) |
| { |
| struct ea_find ef; |
| int error; |
| |
| ef.type = type; |
| ef.name = name; |
| ef.namel = strlen(name); |
| ef.ef_el = el; |
| |
| memset(el, 0, sizeof(struct gfs2_ea_location)); |
| |
| error = ea_foreach(ip, ea_find_i, &ef); |
| if (error > 0) |
| return 0; |
| |
| return error; |
| } |
| |
| /** |
| * ea_dealloc_unstuffed - |
| * @ip: |
| * @bh: |
| * @ea: |
| * @prev: |
| * @private: |
| * |
| * Take advantage of the fact that all unstuffed blocks are |
| * allocated from the same RG. But watch, this may not always |
| * be true. |
| * |
| * Returns: errno |
| */ |
| |
| static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh, |
| struct gfs2_ea_header *ea, |
| struct gfs2_ea_header *prev, void *private) |
| { |
| int *leave = private; |
| struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
| struct gfs2_rgrpd *rgd; |
| struct gfs2_holder rg_gh; |
| __be64 *dataptrs; |
| u64 bn = 0; |
| u64 bstart = 0; |
| unsigned int blen = 0; |
| unsigned int blks = 0; |
| unsigned int x; |
| int error; |
| |
| error = gfs2_rindex_update(sdp); |
| if (error) |
| return error; |
| |
| if (GFS2_EA_IS_STUFFED(ea)) |
| return 0; |
| |
| dataptrs = GFS2_EA2DATAPTRS(ea); |
| for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) { |
| if (*dataptrs) { |
| blks++; |
| bn = be64_to_cpu(*dataptrs); |
| } |
| } |
| if (!blks) |
| return 0; |
| |
| rgd = gfs2_blk2rgrpd(sdp, bn, 1); |
| if (!rgd) { |
| gfs2_consist_inode(ip); |
| return -EIO; |
| } |
| |
| error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh); |
| if (error) |
| return error; |
| |
| error = gfs2_trans_begin(sdp, rgd->rd_length + RES_DINODE + |
| RES_EATTR + RES_STATFS + RES_QUOTA, blks); |
| if (error) |
| goto out_gunlock; |
| |
| gfs2_trans_add_meta(ip->i_gl, bh); |
| |
| dataptrs = GFS2_EA2DATAPTRS(ea); |
| for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) { |
| if (!*dataptrs) |
| break; |
| bn = be64_to_cpu(*dataptrs); |
| |
| if (bstart + blen == bn) |
| blen++; |
| else { |
| if (bstart) |
| gfs2_free_meta(ip, rgd, bstart, blen); |
| bstart = bn; |
| blen = 1; |
| } |
| |
| *dataptrs = 0; |
| gfs2_add_inode_blocks(&ip->i_inode, -1); |
| } |
| if (bstart) |
| gfs2_free_meta(ip, rgd, bstart, blen); |
| |
| if (prev && !leave) { |
| u32 len; |
| |
| len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); |
| prev->ea_rec_len = cpu_to_be32(len); |
| |
| if (GFS2_EA_IS_LAST(ea)) |
| prev->ea_flags |= GFS2_EAFLAG_LAST; |
| } else { |
| ea->ea_type = GFS2_EATYPE_UNUSED; |
| ea->ea_num_ptrs = 0; |
| } |
| |
| ip->i_inode.i_ctime = current_time(&ip->i_inode); |
| __mark_inode_dirty(&ip->i_inode, I_DIRTY_DATASYNC); |
| |
| gfs2_trans_end(sdp); |
| |
| out_gunlock: |
| gfs2_glock_dq_uninit(&rg_gh); |
| return error; |
| } |
| |
| static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh, |
| struct gfs2_ea_header *ea, |
| struct gfs2_ea_header *prev, int leave) |
| { |
| int error; |
| |
| error = gfs2_rindex_update(GFS2_SB(&ip->i_inode)); |
| if (error) |
| return error; |
| |
| error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE); |
| if (error) |
| goto out_alloc; |
| |
| error = ea_dealloc_unstuffed(ip, bh, ea, prev, (leave) ? &error : NULL); |
| |
| gfs2_quota_unhold(ip); |
| out_alloc: |
| return error; |
| } |
| |
| struct ea_list { |
| struct gfs2_ea_request *ei_er; |
| unsigned int ei_size; |
| }; |
| |
| static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh, |
| struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, |
| void *private) |
| { |
| struct ea_list *ei = private; |
| struct gfs2_ea_request *er = ei->ei_er; |
| unsigned int ea_size; |
| char *prefix; |
| unsigned int l; |
| |
| if (ea->ea_type == GFS2_EATYPE_UNUSED) |
| return 0; |
| |
| switch (ea->ea_type) { |
| case GFS2_EATYPE_USR: |
| prefix = "user."; |
| l = 5; |
| break; |
| case GFS2_EATYPE_SYS: |
| prefix = "system."; |
| l = 7; |
| break; |
| case GFS2_EATYPE_SECURITY: |
| prefix = "security."; |
| l = 9; |
| break; |
| default: |
| BUG(); |
| } |
| |
| ea_size = l + ea->ea_name_len + 1; |
| if (er->er_data_len) { |
| if (ei->ei_size + ea_size > er->er_data_len) |
| return -ERANGE; |
| |
| memcpy(er->er_data + ei->ei_size, prefix, l); |
| memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea), |
| ea->ea_name_len); |
| er->er_data[ei->ei_size + ea_size - 1] = 0; |
| } |
| |
| ei->ei_size += ea_size; |
| |
| return 0; |
| } |
| |
| /** |
| * gfs2_listxattr - List gfs2 extended attributes |
| * @dentry: The dentry whose inode we are interested in |
| * @buffer: The buffer to write the results |
| * @size: The size of the buffer |
| * |
| * Returns: actual size of data on success, -errno on error |
| */ |
| |
| ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size) |
| { |
| struct gfs2_inode *ip = GFS2_I(d_inode(dentry)); |
| struct gfs2_ea_request er; |
| struct gfs2_holder i_gh; |
| int error; |
| |
| memset(&er, 0, sizeof(struct gfs2_ea_request)); |
| if (size) { |
| er.er_data = buffer; |
| er.er_data_len = size; |
| } |
| |
| error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); |
| if (error) |
| return error; |
| |
| if (ip->i_eattr) { |
| struct ea_list ei = { .ei_er = &er, .ei_size = 0 }; |
| |
| error = ea_foreach(ip, ea_list_i, &ei); |
| if (!error) |
| error = ei.ei_size; |
| } |
| |
| gfs2_glock_dq_uninit(&i_gh); |
| |
| return error; |
| } |
| |
| /** |
| * ea_iter_unstuffed - copies the unstuffed xattr data to/from the |
| * request buffer |
| * @ip: The GFS2 inode |
| * @ea: The extended attribute header structure |
| * @din: The data to be copied in |
| * @dout: The data to be copied out (one of din,dout will be NULL) |
| * |
| * Returns: errno |
| */ |
| |
| static int gfs2_iter_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea, |
| const char *din, char *dout) |
| { |
| struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
| struct buffer_head **bh; |
| unsigned int amount = GFS2_EA_DATA_LEN(ea); |
| unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize); |
| __be64 *dataptrs = GFS2_EA2DATAPTRS(ea); |
| unsigned int x; |
| int error = 0; |
| unsigned char *pos; |
| unsigned cp_size; |
| |
| bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS); |
| if (!bh) |
| return -ENOMEM; |
| |
| for (x = 0; x < nptrs; x++) { |
| error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0, 0, |
| bh + x); |
| if (error) { |
| while (x--) |
| brelse(bh[x]); |
| goto out; |
| } |
| dataptrs++; |
| } |
| |
| for (x = 0; x < nptrs; x++) { |
| error = gfs2_meta_wait(sdp, bh[x]); |
| if (error) { |
| for (; x < nptrs; x++) |
| brelse(bh[x]); |
| goto out; |
| } |
| if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) { |
| for (; x < nptrs; x++) |
| brelse(bh[x]); |
| error = -EIO; |
| goto out; |
| } |
| |
| pos = bh[x]->b_data + sizeof(struct gfs2_meta_header); |
| cp_size = (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize; |
| |
| if (dout) { |
| memcpy(dout, pos, cp_size); |
| dout += sdp->sd_jbsize; |
| } |
| |
| if (din) { |
| gfs2_trans_add_meta(ip->i_gl, bh[x]); |
| memcpy(pos, din, cp_size); |
| din += sdp->sd_jbsize; |
| } |
| |
| amount -= sdp->sd_jbsize; |
| brelse(bh[x]); |
| } |
| |
| out: |
| kfree(bh); |
| return error; |
| } |
| |
| static int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el, |
| char *data, size_t size) |
| { |
| int ret; |
| size_t len = GFS2_EA_DATA_LEN(el->el_ea); |
| if (len > size) |
| return -ERANGE; |
| |
| if (GFS2_EA_IS_STUFFED(el->el_ea)) { |
| memcpy(data, GFS2_EA2DATA(el->el_ea), len); |
| return len; |
| } |
| ret = gfs2_iter_unstuffed(ip, el->el_ea, NULL, data); |
| if (ret < 0) |
| return ret; |
| return len; |
| } |
| |
| int gfs2_xattr_acl_get(struct gfs2_inode *ip, const char *name, char **ppdata) |
| { |
| struct gfs2_ea_location el; |
| int error; |
| int len; |
| char *data; |
| |
| error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, name, &el); |
| if (error) |
| return error; |
| if (!el.el_ea) |
| goto out; |
| if (!GFS2_EA_DATA_LEN(el.el_ea)) |
| goto out; |
| |
| len = GFS2_EA_DATA_LEN(el.el_ea); |
| data = kmalloc(len, GFP_NOFS); |
| error = -ENOMEM; |
| if (data == NULL) |
| goto out; |
| |
| error = gfs2_ea_get_copy(ip, &el, data, len); |
| if (error < 0) |
| kfree(data); |
| else |
| *ppdata = data; |
| out: |
| brelse(el.el_bh); |
| return error; |
| } |
| |
| /** |
| * gfs2_xattr_get - Get a GFS2 extended attribute |
| * @inode: The inode |
| * @name: The name of the extended attribute |
| * @buffer: The buffer to write the result into |
| * @size: The size of the buffer |
| * @type: The type of extended attribute |
| * |
| * Returns: actual size of data on success, -errno on error |
| */ |
| static int __gfs2_xattr_get(struct inode *inode, const char *name, |
| void *buffer, size_t size, int type) |
| { |
| struct gfs2_inode *ip = GFS2_I(inode); |
| struct gfs2_ea_location el; |
| int error; |
| |
| if (!ip->i_eattr) |
| return -ENODATA; |
| if (strlen(name) > GFS2_EA_MAX_NAME_LEN) |
| return -EINVAL; |
| |
| error = gfs2_ea_find(ip, type, name, &el); |
| if (error) |
| return error; |
| if (!el.el_ea) |
| return -ENODATA; |
| if (size) |
| error = gfs2_ea_get_copy(ip, &el, buffer, size); |
| else |
| error = GFS2_EA_DATA_LEN(el.el_ea); |
| brelse(el.el_bh); |
| |
| return error; |
| } |
| |
| static int gfs2_xattr_get(const struct xattr_handler *handler, |
| struct dentry *unused, struct inode *inode, |
| const char *name, void *buffer, size_t size) |
| { |
| struct gfs2_inode *ip = GFS2_I(inode); |
| struct gfs2_holder gh; |
| int ret; |
| |
| /* During lookup, SELinux calls this function with the glock locked. */ |
| |
| if (!gfs2_glock_is_locked_by_me(ip->i_gl)) { |
| ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); |
| if (ret) |
| return ret; |
| } else { |
| gfs2_holder_mark_uninitialized(&gh); |
| } |
| ret = __gfs2_xattr_get(inode, name, buffer, size, handler->flags); |
| if (gfs2_holder_initialized(&gh)) |
| gfs2_glock_dq_uninit(&gh); |
| return ret; |
| } |
| |
| /** |
| * ea_alloc_blk - allocates a new block for extended attributes. |
| * @ip: A pointer to the inode that's getting extended attributes |
| * @bhp: Pointer to pointer to a struct buffer_head |
| * |
| * Returns: errno |
| */ |
| |
| static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp) |
| { |
| struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
| struct gfs2_ea_header *ea; |
| unsigned int n = 1; |
| u64 block; |
| int error; |
| |
| error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL); |
| if (error) |
| return error; |
| gfs2_trans_remove_revoke(sdp, block, 1); |
| *bhp = gfs2_meta_new(ip->i_gl, block); |
| gfs2_trans_add_meta(ip->i_gl, *bhp); |
| gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA); |
| gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header)); |
| |
| ea = GFS2_EA_BH2FIRST(*bhp); |
| ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); |
| ea->ea_type = GFS2_EATYPE_UNUSED; |
| ea->ea_flags = GFS2_EAFLAG_LAST; |
| ea->ea_num_ptrs = 0; |
| |
| gfs2_add_inode_blocks(&ip->i_inode, 1); |
| |
| return 0; |
| } |
| |
| /** |
| * ea_write - writes the request info to an ea, creating new blocks if |
| * necessary |
| * @ip: inode that is being modified |
| * @ea: the location of the new ea in a block |
| * @er: the write request |
| * |
| * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags |
| * |
| * returns : errno |
| */ |
| |
| static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea, |
| struct gfs2_ea_request *er) |
| { |
| struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
| int error; |
| |
| ea->ea_data_len = cpu_to_be32(er->er_data_len); |
| ea->ea_name_len = er->er_name_len; |
| ea->ea_type = er->er_type; |
| ea->__pad = 0; |
| |
| memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len); |
| |
| if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) { |
| ea->ea_num_ptrs = 0; |
| memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len); |
| } else { |
| __be64 *dataptr = GFS2_EA2DATAPTRS(ea); |
| const char *data = er->er_data; |
| unsigned int data_len = er->er_data_len; |
| unsigned int copy; |
| unsigned int x; |
| |
| ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize); |
| for (x = 0; x < ea->ea_num_ptrs; x++) { |
| struct buffer_head *bh; |
| u64 block; |
| int mh_size = sizeof(struct gfs2_meta_header); |
| unsigned int n = 1; |
| |
| error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL); |
| if (error) |
| return error; |
| gfs2_trans_remove_revoke(sdp, block, 1); |
| bh = gfs2_meta_new(ip->i_gl, block); |
| gfs2_trans_add_meta(ip->i_gl, bh); |
| gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED); |
| |
| gfs2_add_inode_blocks(&ip->i_inode, 1); |
| |
| copy = data_len > sdp->sd_jbsize ? sdp->sd_jbsize : |
| data_len; |
| memcpy(bh->b_data + mh_size, data, copy); |
| if (copy < sdp->sd_jbsize) |
| memset(bh->b_data + mh_size + copy, 0, |
| sdp->sd_jbsize - copy); |
| |
| *dataptr++ = cpu_to_be64(bh->b_blocknr); |
| data += copy; |
| data_len -= copy; |
| |
| brelse(bh); |
| } |
| |
| gfs2_assert_withdraw(sdp, !data_len); |
| } |
| |
| return 0; |
| } |
| |
| typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip, |
| struct gfs2_ea_request *er, void *private); |
| |
| static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er, |
| unsigned int blks, |
| ea_skeleton_call_t skeleton_call, void *private) |
| { |
| struct gfs2_alloc_parms ap = { .target = blks }; |
| int error; |
| |
| error = gfs2_rindex_update(GFS2_SB(&ip->i_inode)); |
| if (error) |
| return error; |
| |
| error = gfs2_quota_lock_check(ip, &ap); |
| if (error) |
| return error; |
| |
| error = gfs2_inplace_reserve(ip, &ap); |
| if (error) |
| goto out_gunlock_q; |
| |
| error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), |
| blks + gfs2_rg_blocks(ip, blks) + |
| RES_DINODE + RES_STATFS + RES_QUOTA, 0); |
| if (error) |
| goto out_ipres; |
| |
| error = skeleton_call(ip, er, private); |
| if (error) |
| goto out_end_trans; |
| |
| ip->i_inode.i_ctime = current_time(&ip->i_inode); |
| __mark_inode_dirty(&ip->i_inode, I_DIRTY_DATASYNC); |
| |
| out_end_trans: |
| gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
| out_ipres: |
| gfs2_inplace_release(ip); |
| out_gunlock_q: |
| gfs2_quota_unlock(ip); |
| return error; |
| } |
| |
| static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er, |
| void *private) |
| { |
| struct buffer_head *bh; |
| int error; |
| |
| error = ea_alloc_blk(ip, &bh); |
| if (error) |
| return error; |
| |
| ip->i_eattr = bh->b_blocknr; |
| error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er); |
| |
| brelse(bh); |
| |
| return error; |
| } |
| |
| /** |
| * ea_init - initializes a new eattr block |
| * @ip: |
| * @er: |
| * |
| * Returns: errno |
| */ |
| |
| static int ea_init(struct gfs2_inode *ip, int type, const char *name, |
| const void *data, size_t size) |
| { |
| struct gfs2_ea_request er; |
| unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize; |
| unsigned int blks = 1; |
| |
| er.er_type = type; |
| er.er_name = name; |
| er.er_name_len = strlen(name); |
| er.er_data = (void *)data; |
| er.er_data_len = size; |
| |
| if (GFS2_EAREQ_SIZE_STUFFED(&er) > jbsize) |
| blks += DIV_ROUND_UP(er.er_data_len, jbsize); |
| |
| return ea_alloc_skeleton(ip, &er, blks, ea_init_i, NULL); |
| } |
| |
| static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea) |
| { |
| u32 ea_size = GFS2_EA_SIZE(ea); |
| struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea + |
| ea_size); |
| u32 new_size = GFS2_EA_REC_LEN(ea) - ea_size; |
| int last = ea->ea_flags & GFS2_EAFLAG_LAST; |
| |
| ea->ea_rec_len = cpu_to_be32(ea_size); |
| ea->ea_flags ^= last; |
| |
| new->ea_rec_len = cpu_to_be32(new_size); |
| new->ea_flags = last; |
| |
| return new; |
| } |
| |
| static void ea_set_remove_stuffed(struct gfs2_inode *ip, |
| struct gfs2_ea_location *el) |
| { |
| struct gfs2_ea_header *ea = el->el_ea; |
| struct gfs2_ea_header *prev = el->el_prev; |
| u32 len; |
| |
| gfs2_trans_add_meta(ip->i_gl, el->el_bh); |
| |
| if (!prev || !GFS2_EA_IS_STUFFED(ea)) { |
| ea->ea_type = GFS2_EATYPE_UNUSED; |
| return; |
| } else if (GFS2_EA2NEXT(prev) != ea) { |
| prev = GFS2_EA2NEXT(prev); |
| gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea); |
| } |
| |
| len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); |
| prev->ea_rec_len = cpu_to_be32(len); |
| |
| if (GFS2_EA_IS_LAST(ea)) |
| prev->ea_flags |= GFS2_EAFLAG_LAST; |
| } |
| |
| struct ea_set { |
| int ea_split; |
| |
| struct gfs2_ea_request *es_er; |
| struct gfs2_ea_location *es_el; |
| |
| struct buffer_head *es_bh; |
| struct gfs2_ea_header *es_ea; |
| }; |
| |
| static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh, |
| struct gfs2_ea_header *ea, struct ea_set *es) |
| { |
| struct gfs2_ea_request *er = es->es_er; |
| int error; |
| |
| error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0); |
| if (error) |
| return error; |
| |
| gfs2_trans_add_meta(ip->i_gl, bh); |
| |
| if (es->ea_split) |
| ea = ea_split_ea(ea); |
| |
| ea_write(ip, ea, er); |
| |
| if (es->es_el) |
| ea_set_remove_stuffed(ip, es->es_el); |
| |
| ip->i_inode.i_ctime = current_time(&ip->i_inode); |
| __mark_inode_dirty(&ip->i_inode, I_DIRTY_DATASYNC); |
| |
| gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
| return error; |
| } |
| |
| static int ea_set_simple_alloc(struct gfs2_inode *ip, |
| struct gfs2_ea_request *er, void *private) |
| { |
| struct ea_set *es = private; |
| struct gfs2_ea_header *ea = es->es_ea; |
| int error; |
| |
| gfs2_trans_add_meta(ip->i_gl, es->es_bh); |
| |
| if (es->ea_split) |
| ea = ea_split_ea(ea); |
| |
| error = ea_write(ip, ea, er); |
| if (error) |
| return error; |
| |
| if (es->es_el) |
| ea_set_remove_stuffed(ip, es->es_el); |
| |
| return 0; |
| } |
| |
| static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh, |
| struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, |
| void *private) |
| { |
| struct ea_set *es = private; |
| unsigned int size; |
| int stuffed; |
| int error; |
| |
| stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er->er_name_len, |
| es->es_er->er_data_len, &size); |
| |
| if (ea->ea_type == GFS2_EATYPE_UNUSED) { |
| if (GFS2_EA_REC_LEN(ea) < size) |
| return 0; |
| if (!GFS2_EA_IS_STUFFED(ea)) { |
| error = ea_remove_unstuffed(ip, bh, ea, prev, 1); |
| if (error) |
| return error; |
| } |
| es->ea_split = 0; |
| } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size) |
| es->ea_split = 1; |
| else |
| return 0; |
| |
| if (stuffed) { |
| error = ea_set_simple_noalloc(ip, bh, ea, es); |
| if (error) |
| return error; |
| } else { |
| unsigned int blks; |
| |
| es->es_bh = bh; |
| es->es_ea = ea; |
| blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len, |
| GFS2_SB(&ip->i_inode)->sd_jbsize); |
| |
| error = ea_alloc_skeleton(ip, es->es_er, blks, |
| ea_set_simple_alloc, es); |
| if (error) |
| return error; |
| } |
| |
| return 1; |
| } |
| |
| static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er, |
| void *private) |
| { |
| struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
| struct buffer_head *indbh, *newbh; |
| __be64 *eablk; |
| int error; |
| int mh_size = sizeof(struct gfs2_meta_header); |
| |
| if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) { |
| __be64 *end; |
| |
| error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0, |
| &indbh); |
| if (error) |
| return error; |
| |
| if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { |
| error = -EIO; |
| goto out; |
| } |
| |
| eablk = (__be64 *)(indbh->b_data + mh_size); |
| end = eablk + sdp->sd_inptrs; |
| |
| for (; eablk < end; eablk++) |
| if (!*eablk) |
| break; |
| |
| if (eablk == end) { |
| error = -ENOSPC; |
| goto out; |
| } |
| |
| gfs2_trans_add_meta(ip->i_gl, indbh); |
| } else { |
| u64 blk; |
| unsigned int n = 1; |
| error = gfs2_alloc_blocks(ip, &blk, &n, 0, NULL); |
| if (error) |
| return error; |
| gfs2_trans_remove_revoke(sdp, blk, 1); |
| indbh = gfs2_meta_new(ip->i_gl, blk); |
| gfs2_trans_add_meta(ip->i_gl, indbh); |
| gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN); |
| gfs2_buffer_clear_tail(indbh, mh_size); |
| |
| eablk = (__be64 *)(indbh->b_data + mh_size); |
| *eablk = cpu_to_be64(ip->i_eattr); |
| ip->i_eattr = blk; |
| ip->i_diskflags |= GFS2_DIF_EA_INDIRECT; |
| gfs2_add_inode_blocks(&ip->i_inode, 1); |
| |
| eablk++; |
| } |
| |
| error = ea_alloc_blk(ip, &newbh); |
| if (error) |
| goto out; |
| |
| *eablk = cpu_to_be64((u64)newbh->b_blocknr); |
| error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er); |
| brelse(newbh); |
| if (error) |
| goto out; |
| |
| if (private) |
| ea_set_remove_stuffed(ip, private); |
| |
| out: |
| brelse(indbh); |
| return error; |
| } |
| |
| static int ea_set_i(struct gfs2_inode *ip, int type, const char *name, |
| const void *value, size_t size, struct gfs2_ea_location *el) |
| { |
| struct gfs2_ea_request er; |
| struct ea_set es; |
| unsigned int blks = 2; |
| int error; |
| |
| er.er_type = type; |
| er.er_name = name; |
| er.er_data = (void *)value; |
| er.er_name_len = strlen(name); |
| er.er_data_len = size; |
| |
| memset(&es, 0, sizeof(struct ea_set)); |
| es.es_er = &er; |
| es.es_el = el; |
| |
| error = ea_foreach(ip, ea_set_simple, &es); |
| if (error > 0) |
| return 0; |
| if (error) |
| return error; |
| |
| if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) |
| blks++; |
| if (GFS2_EAREQ_SIZE_STUFFED(&er) > GFS2_SB(&ip->i_inode)->sd_jbsize) |
| blks += DIV_ROUND_UP(er.er_data_len, GFS2_SB(&ip->i_inode)->sd_jbsize); |
| |
| return ea_alloc_skeleton(ip, &er, blks, ea_set_block, el); |
| } |
| |
| static int ea_set_remove_unstuffed(struct gfs2_inode *ip, |
| struct gfs2_ea_location *el) |
| { |
| if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) { |
| el->el_prev = GFS2_EA2NEXT(el->el_prev); |
| gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), |
| GFS2_EA2NEXT(el->el_prev) == el->el_ea); |
| } |
| |
| return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev, 0); |
| } |
| |
| static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el) |
| { |
| struct gfs2_ea_header *ea = el->el_ea; |
| struct gfs2_ea_header *prev = el->el_prev; |
| int error; |
| |
| error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0); |
| if (error) |
| return error; |
| |
| gfs2_trans_add_meta(ip->i_gl, el->el_bh); |
| |
| if (prev) { |
| u32 len; |
| |
| len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); |
| prev->ea_rec_len = cpu_to_be32(len); |
| |
| if (GFS2_EA_IS_LAST(ea)) |
| prev->ea_flags |= GFS2_EAFLAG_LAST; |
| } else { |
| ea->ea_type = GFS2_EATYPE_UNUSED; |
| } |
| |
| ip->i_inode.i_ctime = current_time(&ip->i_inode); |
| __mark_inode_dirty(&ip->i_inode, I_DIRTY_DATASYNC); |
| |
| gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
| |
| return error; |
| } |
| |
| /** |
| * gfs2_xattr_remove - Remove a GFS2 extended attribute |
| * @ip: The inode |
| * @type: The type of the extended attribute |
| * @name: The name of the extended attribute |
| * |
| * This is not called directly by the VFS since we use the (common) |
| * scheme of making a "set with NULL data" mean a remove request. Note |
| * that this is different from a set with zero length data. |
| * |
| * Returns: 0, or errno on failure |
| */ |
| |
| static int gfs2_xattr_remove(struct gfs2_inode *ip, int type, const char *name) |
| { |
| struct gfs2_ea_location el; |
| int error; |
| |
| if (!ip->i_eattr) |
| return -ENODATA; |
| |
| error = gfs2_ea_find(ip, type, name, &el); |
| if (error) |
| return error; |
| if (!el.el_ea) |
| return -ENODATA; |
| |
| if (GFS2_EA_IS_STUFFED(el.el_ea)) |
| error = ea_remove_stuffed(ip, &el); |
| else |
| error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev, 0); |
| |
| brelse(el.el_bh); |
| |
| return error; |
| } |
| |
| /** |
| * __gfs2_xattr_set - Set (or remove) a GFS2 extended attribute |
| * @ip: The inode |
| * @name: The name of the extended attribute |
| * @value: The value of the extended attribute (NULL for remove) |
| * @size: The size of the @value argument |
| * @flags: Create or Replace |
| * @type: The type of the extended attribute |
| * |
| * See gfs2_xattr_remove() for details of the removal of xattrs. |
| * |
| * Returns: 0 or errno on failure |
| */ |
| |
| int __gfs2_xattr_set(struct inode *inode, const char *name, |
| const void *value, size_t size, int flags, int type) |
| { |
| struct gfs2_inode *ip = GFS2_I(inode); |
| struct gfs2_sbd *sdp = GFS2_SB(inode); |
| struct gfs2_ea_location el; |
| unsigned int namel = strlen(name); |
| int error; |
| |
| if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) |
| return -EPERM; |
| if (namel > GFS2_EA_MAX_NAME_LEN) |
| return -ERANGE; |
| |
| if (value == NULL) { |
| error = gfs2_xattr_remove(ip, type, name); |
| if (error == -ENODATA && !(flags & XATTR_REPLACE)) |
| error = 0; |
| return error; |
| } |
| |
| if (ea_check_size(sdp, namel, size)) |
| return -ERANGE; |
| |
| if (!ip->i_eattr) { |
| if (flags & XATTR_REPLACE) |
| return -ENODATA; |
| return ea_init(ip, type, name, value, size); |
| } |
| |
| error = gfs2_ea_find(ip, type, name, &el); |
| if (error) |
| return error; |
| |
| if (el.el_ea) { |
| if (ip->i_diskflags & GFS2_DIF_APPENDONLY) { |
| brelse(el.el_bh); |
| return -EPERM; |
| } |
| |
| error = -EEXIST; |
| if (!(flags & XATTR_CREATE)) { |
| int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea); |
| error = ea_set_i(ip, type, name, value, size, &el); |
| if (!error && unstuffed) |
| ea_set_remove_unstuffed(ip, &el); |
| } |
| |
| brelse(el.el_bh); |
| return error; |
| } |
| |
| error = -ENODATA; |
| if (!(flags & XATTR_REPLACE)) |
| error = ea_set_i(ip, type, name, value, size, NULL); |
| |
| return error; |
| } |
| |
| static int gfs2_xattr_set(const struct xattr_handler *handler, |
| struct dentry *unused, struct inode *inode, |
| const char *name, const void *value, |
| size_t size, int flags) |
| { |
| struct gfs2_inode *ip = GFS2_I(inode); |
| struct gfs2_holder gh; |
| int ret; |
| |
| ret = gfs2_rsqa_alloc(ip); |
| if (ret) |
| return ret; |
| |
| /* May be called from gfs_setattr with the glock locked. */ |
| |
| if (!gfs2_glock_is_locked_by_me(ip->i_gl)) { |
| ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
| if (ret) |
| return ret; |
| } else { |
| if (WARN_ON_ONCE(ip->i_gl->gl_state != LM_ST_EXCLUSIVE)) |
| return -EIO; |
| gfs2_holder_mark_uninitialized(&gh); |
| } |
| ret = __gfs2_xattr_set(inode, name, value, size, flags, handler->flags); |
| if (gfs2_holder_initialized(&gh)) |
| gfs2_glock_dq_uninit(&gh); |
| return ret; |
| } |
| |
| static int ea_dealloc_indirect(struct gfs2_inode *ip) |
| { |
| struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
| struct gfs2_rgrp_list rlist; |
| struct gfs2_rgrpd *rgd; |
| struct buffer_head *indbh, *dibh; |
| __be64 *eablk, *end; |
| unsigned int rg_blocks = 0; |
| u64 bstart = 0; |
| unsigned int blen = 0; |
| unsigned int blks = 0; |
| unsigned int x; |
| int error; |
| |
| error = gfs2_rindex_update(sdp); |
| if (error) |
| return error; |
| |
| memset(&rlist, 0, sizeof(struct gfs2_rgrp_list)); |
| |
| error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, 0, &indbh); |
| if (error) |
| return error; |
| |
| if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { |
| error = -EIO; |
| goto out; |
| } |
| |
| eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header)); |
| end = eablk + sdp->sd_inptrs; |
| |
| for (; eablk < end; eablk++) { |
| u64 bn; |
| |
| if (!*eablk) |
| break; |
| bn = be64_to_cpu(*eablk); |
| |
| if (bstart + blen == bn) |
| blen++; |
| else { |
| if (bstart) |
| gfs2_rlist_add(ip, &rlist, bstart); |
| bstart = bn; |
| blen = 1; |
| } |
| blks++; |
| } |
| if (bstart) |
| gfs2_rlist_add(ip, &rlist, bstart); |
| else |
| goto out; |
| |
| gfs2_rlist_alloc(&rlist); |
| |
| for (x = 0; x < rlist.rl_rgrps; x++) { |
| rgd = gfs2_glock2rgrp(rlist.rl_ghs[x].gh_gl); |
| rg_blocks += rgd->rd_length; |
| } |
| |
| error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs); |
| if (error) |
| goto out_rlist_free; |
| |
| error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + RES_INDIRECT + |
| RES_STATFS + RES_QUOTA, blks); |
| if (error) |
| goto out_gunlock; |
| |
| gfs2_trans_add_meta(ip->i_gl, indbh); |
| |
| eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header)); |
| bstart = 0; |
| rgd = NULL; |
| blen = 0; |
| |
| for (; eablk < end; eablk++) { |
| u64 bn; |
| |
| if (!*eablk) |
| break; |
| bn = be64_to_cpu(*eablk); |
| |
| if (bstart + blen == bn) |
| blen++; |
| else { |
| if (bstart) |
| gfs2_free_meta(ip, rgd, bstart, blen); |
| bstart = bn; |
| rgd = gfs2_blk2rgrpd(sdp, bstart, true); |
| blen = 1; |
| } |
| |
| *eablk = 0; |
| gfs2_add_inode_blocks(&ip->i_inode, -1); |
| } |
| if (bstart) |
| gfs2_free_meta(ip, rgd, bstart, blen); |
| |
| ip->i_diskflags &= ~GFS2_DIF_EA_INDIRECT; |
| |
| error = gfs2_meta_inode_buffer(ip, &dibh); |
| if (!error) { |
| gfs2_trans_add_meta(ip->i_gl, dibh); |
| gfs2_dinode_out(ip, dibh->b_data); |
| brelse(dibh); |
| } |
| |
| gfs2_trans_end(sdp); |
| |
| out_gunlock: |
| gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs); |
| out_rlist_free: |
| gfs2_rlist_free(&rlist); |
| out: |
| brelse(indbh); |
| return error; |
| } |
| |
| static int ea_dealloc_block(struct gfs2_inode *ip) |
| { |
| struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
| struct gfs2_rgrpd *rgd; |
| struct buffer_head *dibh; |
| struct gfs2_holder gh; |
| int error; |
| |
| error = gfs2_rindex_update(sdp); |
| if (error) |
| return error; |
| |
| rgd = gfs2_blk2rgrpd(sdp, ip->i_eattr, 1); |
| if (!rgd) { |
| gfs2_consist_inode(ip); |
| return -EIO; |
| } |
| |
| error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh); |
| if (error) |
| return error; |
| |
| error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + RES_STATFS + |
| RES_QUOTA, 1); |
| if (error) |
| goto out_gunlock; |
| |
| gfs2_free_meta(ip, rgd, ip->i_eattr, 1); |
| |
| ip->i_eattr = 0; |
| gfs2_add_inode_blocks(&ip->i_inode, -1); |
| |
| error = gfs2_meta_inode_buffer(ip, &dibh); |
| if (!error) { |
| gfs2_trans_add_meta(ip->i_gl, dibh); |
| gfs2_dinode_out(ip, dibh->b_data); |
| brelse(dibh); |
| } |
| |
| gfs2_trans_end(sdp); |
| |
| out_gunlock: |
| gfs2_glock_dq_uninit(&gh); |
| return error; |
| } |
| |
| /** |
| * gfs2_ea_dealloc - deallocate the extended attribute fork |
| * @ip: the inode |
| * |
| * Returns: errno |
| */ |
| |
| int gfs2_ea_dealloc(struct gfs2_inode *ip) |
| { |
| int error; |
| |
| error = gfs2_rindex_update(GFS2_SB(&ip->i_inode)); |
| if (error) |
| return error; |
| |
| error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE); |
| if (error) |
| return error; |
| |
| error = ea_foreach(ip, ea_dealloc_unstuffed, NULL); |
| if (error) |
| goto out_quota; |
| |
| if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) { |
| error = ea_dealloc_indirect(ip); |
| if (error) |
| goto out_quota; |
| } |
| |
| error = ea_dealloc_block(ip); |
| |
| out_quota: |
| gfs2_quota_unhold(ip); |
| return error; |
| } |
| |
| static const struct xattr_handler gfs2_xattr_user_handler = { |
| .prefix = XATTR_USER_PREFIX, |
| .flags = GFS2_EATYPE_USR, |
| .get = gfs2_xattr_get, |
| .set = gfs2_xattr_set, |
| }; |
| |
| static const struct xattr_handler gfs2_xattr_security_handler = { |
| .prefix = XATTR_SECURITY_PREFIX, |
| .flags = GFS2_EATYPE_SECURITY, |
| .get = gfs2_xattr_get, |
| .set = gfs2_xattr_set, |
| }; |
| |
| const struct xattr_handler *gfs2_xattr_handlers[] = { |
| &gfs2_xattr_user_handler, |
| &gfs2_xattr_security_handler, |
| &posix_acl_access_xattr_handler, |
| &posix_acl_default_xattr_handler, |
| NULL, |
| }; |
| |