17336d0e6SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 22ab9cd1cSSteven Whitehouse /* 32ab9cd1cSSteven Whitehouse * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 4f2741d98SSteven Whitehouse * Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved. 52ab9cd1cSSteven Whitehouse */ 62ab9cd1cSSteven Whitehouse 72ab9cd1cSSteven Whitehouse #include <linux/slab.h> 82ab9cd1cSSteven Whitehouse #include <linux/spinlock.h> 92ab9cd1cSSteven Whitehouse #include <linux/completion.h> 102ab9cd1cSSteven Whitehouse #include <linux/buffer_head.h> 112ab9cd1cSSteven Whitehouse #include <linux/namei.h> 122ab9cd1cSSteven Whitehouse #include <linux/mm.h> 135b825c3aSIngo Molnar #include <linux/cred.h> 142ab9cd1cSSteven Whitehouse #include <linux/xattr.h> 152ab9cd1cSSteven Whitehouse #include <linux/posix_acl.h> 162ab9cd1cSSteven Whitehouse #include <linux/gfs2_ondisk.h> 172ab9cd1cSSteven Whitehouse #include <linux/crc32.h> 18aac1a55bSBob Peterson #include <linux/iomap.h> 192ab9cd1cSSteven Whitehouse #include <linux/security.h> 2010c5db28SChristoph Hellwig #include <linux/fiemap.h> 217c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 222ab9cd1cSSteven Whitehouse 232ab9cd1cSSteven Whitehouse #include "gfs2.h" 242ab9cd1cSSteven Whitehouse #include "incore.h" 252ab9cd1cSSteven Whitehouse #include "acl.h" 262ab9cd1cSSteven Whitehouse #include "bmap.h" 272ab9cd1cSSteven Whitehouse #include "dir.h" 282ab9cd1cSSteven Whitehouse #include "xattr.h" 292ab9cd1cSSteven Whitehouse #include "glock.h" 302ab9cd1cSSteven Whitehouse #include "inode.h" 312ab9cd1cSSteven Whitehouse #include "meta_io.h" 322ab9cd1cSSteven Whitehouse #include "quota.h" 332ab9cd1cSSteven Whitehouse #include "rgrp.h" 342ab9cd1cSSteven Whitehouse #include "trans.h" 352ab9cd1cSSteven Whitehouse #include "util.h" 362ab9cd1cSSteven Whitehouse #include "super.h" 372ab9cd1cSSteven Whitehouse #include "glops.h" 382ab9cd1cSSteven Whitehouse 39e3a77eebSAndreas Gruenbacher static const struct inode_operations gfs2_file_iops; 40e3a77eebSAndreas Gruenbacher static const struct inode_operations gfs2_dir_iops; 41e3a77eebSAndreas Gruenbacher static const struct inode_operations gfs2_symlink_iops; 42e3a77eebSAndreas Gruenbacher 432ab9cd1cSSteven Whitehouse /** 442ab9cd1cSSteven Whitehouse * gfs2_set_iop - Sets inode operations 452ab9cd1cSSteven Whitehouse * @inode: The inode with correct i_mode filled in 462ab9cd1cSSteven Whitehouse * 472ab9cd1cSSteven Whitehouse * GFS2 lookup code fills in vfs inode contents based on info obtained 482ab9cd1cSSteven Whitehouse * from directory entry inside gfs2_inode_lookup(). 492ab9cd1cSSteven Whitehouse */ 502ab9cd1cSSteven Whitehouse 512ab9cd1cSSteven Whitehouse static void gfs2_set_iop(struct inode *inode) 522ab9cd1cSSteven Whitehouse { 532ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 542ab9cd1cSSteven Whitehouse umode_t mode = inode->i_mode; 552ab9cd1cSSteven Whitehouse 562ab9cd1cSSteven Whitehouse if (S_ISREG(mode)) { 572ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_file_iops; 582ab9cd1cSSteven Whitehouse if (gfs2_localflocks(sdp)) 592ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_file_fops_nolock; 602ab9cd1cSSteven Whitehouse else 612ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_file_fops; 622ab9cd1cSSteven Whitehouse } else if (S_ISDIR(mode)) { 632ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_dir_iops; 642ab9cd1cSSteven Whitehouse if (gfs2_localflocks(sdp)) 652ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_dir_fops_nolock; 662ab9cd1cSSteven Whitehouse else 672ab9cd1cSSteven Whitehouse inode->i_fop = &gfs2_dir_fops; 682ab9cd1cSSteven Whitehouse } else if (S_ISLNK(mode)) { 692ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_symlink_iops; 702ab9cd1cSSteven Whitehouse } else { 712ab9cd1cSSteven Whitehouse inode->i_op = &gfs2_file_iops; 722ab9cd1cSSteven Whitehouse init_special_inode(inode, inode->i_mode, inode->i_rdev); 732ab9cd1cSSteven Whitehouse } 742ab9cd1cSSteven Whitehouse } 752ab9cd1cSSteven Whitehouse 765f6e13baSAndreas Gruenbacher static int iget_test(struct inode *inode, void *opaque) 775f6e13baSAndreas Gruenbacher { 785f6e13baSAndreas Gruenbacher u64 no_addr = *(u64 *)opaque; 795f6e13baSAndreas Gruenbacher 805f6e13baSAndreas Gruenbacher return GFS2_I(inode)->i_no_addr == no_addr; 815f6e13baSAndreas Gruenbacher } 825f6e13baSAndreas Gruenbacher 835f6e13baSAndreas Gruenbacher static int iget_set(struct inode *inode, void *opaque) 845f6e13baSAndreas Gruenbacher { 855f6e13baSAndreas Gruenbacher u64 no_addr = *(u64 *)opaque; 865f6e13baSAndreas Gruenbacher 875f6e13baSAndreas Gruenbacher GFS2_I(inode)->i_no_addr = no_addr; 885f6e13baSAndreas Gruenbacher inode->i_ino = no_addr; 895f6e13baSAndreas Gruenbacher return 0; 905f6e13baSAndreas Gruenbacher } 915f6e13baSAndreas Gruenbacher 922ab9cd1cSSteven Whitehouse /** 932ab9cd1cSSteven Whitehouse * gfs2_inode_lookup - Lookup an inode 942ab9cd1cSSteven Whitehouse * @sb: The super block 952ab9cd1cSSteven Whitehouse * @type: The type of the inode 963ce37b2cSAndreas Gruenbacher * @no_addr: The inode number 973ce37b2cSAndreas Gruenbacher * @no_formal_ino: The inode generation number 983ce37b2cSAndreas Gruenbacher * @blktype: Requested block type (GFS2_BLKST_DINODE or GFS2_BLKST_UNLINKED; 9961b91cfdSAndreas Gruenbacher * GFS2_BLKST_FREE to indicate not to verify) 1003ce37b2cSAndreas Gruenbacher * 1013ce37b2cSAndreas Gruenbacher * If @type is DT_UNKNOWN, the inode type is fetched from disk. 1023ce37b2cSAndreas Gruenbacher * 1033ce37b2cSAndreas Gruenbacher * If @blktype is anything other than GFS2_BLKST_FREE (which is used as a 1043ce37b2cSAndreas Gruenbacher * placeholder because it doesn't otherwise make sense), the on-disk block type 1053ce37b2cSAndreas Gruenbacher * is verified to be @blktype. 1062ab9cd1cSSteven Whitehouse * 107b66648adSAndreas Gruenbacher * When @no_formal_ino is non-zero, this function will return ERR_PTR(-ESTALE) 108b66648adSAndreas Gruenbacher * if it detects that @no_formal_ino doesn't match the actual inode generation 109b66648adSAndreas Gruenbacher * number. However, it doesn't always know unless @type is DT_UNKNOWN. 110b66648adSAndreas Gruenbacher * 1112ab9cd1cSSteven Whitehouse * Returns: A VFS inode, or an error 1122ab9cd1cSSteven Whitehouse */ 1132ab9cd1cSSteven Whitehouse 1142ab9cd1cSSteven Whitehouse struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type, 1153ce37b2cSAndreas Gruenbacher u64 no_addr, u64 no_formal_ino, 1163ce37b2cSAndreas Gruenbacher unsigned int blktype) 1172ab9cd1cSSteven Whitehouse { 1182ab9cd1cSSteven Whitehouse struct inode *inode; 1192ab9cd1cSSteven Whitehouse struct gfs2_inode *ip; 1203ce37b2cSAndreas Gruenbacher struct gfs2_holder i_gh; 1212ab9cd1cSSteven Whitehouse int error; 1222ab9cd1cSSteven Whitehouse 1236df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&i_gh); 1245f6e13baSAndreas Gruenbacher inode = iget5_locked(sb, no_addr, iget_test, iget_set, &no_addr); 1252ab9cd1cSSteven Whitehouse if (!inode) 126ac3beb6aSSteven Whitehouse return ERR_PTR(-ENOMEM); 1272ab9cd1cSSteven Whitehouse 128e97321faSBob Peterson ip = GFS2_I(inode); 129e97321faSBob Peterson 1302ab9cd1cSSteven Whitehouse if (inode->i_state & I_NEW) { 1312ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 1325f6e13baSAndreas Gruenbacher struct gfs2_glock *io_gl; 133c412a97cSBob Peterson int extra_flags = 0; 1342ab9cd1cSSteven Whitehouse 13529464ee3SAndreas Gruenbacher error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, 13629464ee3SAndreas Gruenbacher &ip->i_gl); 13729464ee3SAndreas Gruenbacher if (unlikely(error)) 13829464ee3SAndreas Gruenbacher goto fail; 13929464ee3SAndreas Gruenbacher 14029464ee3SAndreas Gruenbacher error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, 14129464ee3SAndreas Gruenbacher &io_gl); 14229464ee3SAndreas Gruenbacher if (unlikely(error)) 14329464ee3SAndreas Gruenbacher goto fail; 14429464ee3SAndreas Gruenbacher 145c412a97cSBob Peterson if (blktype == GFS2_BLKST_UNLINKED) 146c412a97cSBob Peterson extra_flags |= LM_FLAG_TRY; 147c412a97cSBob Peterson else 14829464ee3SAndreas Gruenbacher gfs2_cancel_delete_work(io_gl); 149c412a97cSBob Peterson error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, 150c7d7d2d3SAndreas Gruenbacher GL_EXACT | GL_NOPID | extra_flags, 15129464ee3SAndreas Gruenbacher &ip->i_iopen_gh); 15229464ee3SAndreas Gruenbacher gfs2_glock_put(io_gl); 1532ab9cd1cSSteven Whitehouse if (unlikely(error)) 1542ab9cd1cSSteven Whitehouse goto fail; 1552ab9cd1cSSteven Whitehouse 1563ce37b2cSAndreas Gruenbacher if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) { 1573ce37b2cSAndreas Gruenbacher /* 1583ce37b2cSAndreas Gruenbacher * The GL_SKIP flag indicates to skip reading the inode 1595f6e13baSAndreas Gruenbacher * block. We read the inode when instantiating it 1603ce37b2cSAndreas Gruenbacher * after possibly checking the block type. 1613ce37b2cSAndreas Gruenbacher */ 1623ce37b2cSAndreas Gruenbacher error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 1633ce37b2cSAndreas Gruenbacher GL_SKIP, &i_gh); 1643ce37b2cSAndreas Gruenbacher if (error) 16540e7e86eSAndreas Gruenbacher goto fail; 1663ce37b2cSAndreas Gruenbacher 167b66648adSAndreas Gruenbacher error = -ESTALE; 168b66648adSAndreas Gruenbacher if (no_formal_ino && 169b66648adSAndreas Gruenbacher gfs2_inode_already_deleted(ip->i_gl, no_formal_ino)) 170b66648adSAndreas Gruenbacher goto fail; 171b66648adSAndreas Gruenbacher 1723ce37b2cSAndreas Gruenbacher if (blktype != GFS2_BLKST_FREE) { 1733ce37b2cSAndreas Gruenbacher error = gfs2_check_blk_type(sdp, no_addr, 1743ce37b2cSAndreas Gruenbacher blktype); 1753ce37b2cSAndreas Gruenbacher if (error) 17640e7e86eSAndreas Gruenbacher goto fail; 1773ce37b2cSAndreas Gruenbacher } 1783ce37b2cSAndreas Gruenbacher } 1793ce37b2cSAndreas Gruenbacher 180f2e70d8fSBob Peterson set_bit(GLF_INSTANTIATE_NEEDED, &ip->i_gl->gl_flags); 1815f6e13baSAndreas Gruenbacher 1822b0fb353SAndreas Gruenbacher /* Lowest possible timestamp; will be overwritten in gfs2_dinode_in. */ 1832b0fb353SAndreas Gruenbacher inode->i_atime.tv_sec = 1LL << (8 * sizeof(inode->i_atime.tv_sec) - 1); 1842b0fb353SAndreas Gruenbacher inode->i_atime.tv_nsec = 0; 1852b0fb353SAndreas Gruenbacher 1865f6e13baSAndreas Gruenbacher glock_set_object(ip->i_gl, ip); 1875f6e13baSAndreas Gruenbacher 1882ab9cd1cSSteven Whitehouse if (type == DT_UNKNOWN) { 1892ab9cd1cSSteven Whitehouse /* Inode glock must be locked already */ 190f2e70d8fSBob Peterson error = gfs2_instantiate(&i_gh); 1915f6e13baSAndreas Gruenbacher if (error) { 1925f6e13baSAndreas Gruenbacher glock_clear_object(ip->i_gl, ip); 19340e7e86eSAndreas Gruenbacher goto fail; 1945f6e13baSAndreas Gruenbacher } 1952ab9cd1cSSteven Whitehouse } else { 1962b0fb353SAndreas Gruenbacher ip->i_no_formal_ino = no_formal_ino; 1972ab9cd1cSSteven Whitehouse inode->i_mode = DT2IF(type); 1982ab9cd1cSSteven Whitehouse } 1992ab9cd1cSSteven Whitehouse 2006df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&i_gh)) 2013ce37b2cSAndreas Gruenbacher gfs2_glock_dq_uninit(&i_gh); 2025f6e13baSAndreas Gruenbacher glock_set_object(ip->i_iopen_gh.gh_gl, ip); 203b66648adSAndreas Gruenbacher 204b66648adSAndreas Gruenbacher gfs2_set_iop(inode); 205b8e12e35SAndreas Gruenbacher unlock_new_inode(inode); 206b66648adSAndreas Gruenbacher } 207b66648adSAndreas Gruenbacher 208b66648adSAndreas Gruenbacher if (no_formal_ino && ip->i_no_formal_ino && 209b66648adSAndreas Gruenbacher no_formal_ino != ip->i_no_formal_ino) { 210b66648adSAndreas Gruenbacher iput(inode); 211b8e12e35SAndreas Gruenbacher return ERR_PTR(-ESTALE); 212b66648adSAndreas Gruenbacher } 213b66648adSAndreas Gruenbacher 2142ab9cd1cSSteven Whitehouse return inode; 2152ab9cd1cSSteven Whitehouse 21640e7e86eSAndreas Gruenbacher fail: 217c412a97cSBob Peterson if (error == GLR_TRYFAILED) 218c412a97cSBob Peterson error = -EAGAIN; 2195f6e13baSAndreas Gruenbacher if (gfs2_holder_initialized(&ip->i_iopen_gh)) 220763766c0SBob Peterson gfs2_glock_dq_uninit(&ip->i_iopen_gh); 2216df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&i_gh)) 2223ce37b2cSAndreas Gruenbacher gfs2_glock_dq_uninit(&i_gh); 2232ab9cd1cSSteven Whitehouse iget_failed(inode); 2242ab9cd1cSSteven Whitehouse return ERR_PTR(error); 2252ab9cd1cSSteven Whitehouse } 2262ab9cd1cSSteven Whitehouse 2276bdcadeaSAndreas Gruenbacher /** 2286bdcadeaSAndreas Gruenbacher * gfs2_lookup_by_inum - look up an inode by inode number 2296bdcadeaSAndreas Gruenbacher * @sdp: The super block 2306bdcadeaSAndreas Gruenbacher * @no_addr: The inode number 2316bdcadeaSAndreas Gruenbacher * @no_formal_ino: The inode generation number (0 for any) 2326bdcadeaSAndreas Gruenbacher * @blktype: Requested block type (see gfs2_inode_lookup) 2336bdcadeaSAndreas Gruenbacher */ 2342ab9cd1cSSteven Whitehouse struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr, 2356bdcadeaSAndreas Gruenbacher u64 no_formal_ino, unsigned int blktype) 2362ab9cd1cSSteven Whitehouse { 2372ab9cd1cSSteven Whitehouse struct super_block *sb = sdp->sd_vfs; 2383ce37b2cSAndreas Gruenbacher struct inode *inode; 2392ab9cd1cSSteven Whitehouse int error; 2402ab9cd1cSSteven Whitehouse 241b66648adSAndreas Gruenbacher inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, no_formal_ino, 242b66648adSAndreas Gruenbacher blktype); 2432ab9cd1cSSteven Whitehouse if (IS_ERR(inode)) 2443ce37b2cSAndreas Gruenbacher return inode; 2452ab9cd1cSSteven Whitehouse 2462ab9cd1cSSteven Whitehouse if (no_formal_ino) { 2472ab9cd1cSSteven Whitehouse error = -EIO; 2482ab9cd1cSSteven Whitehouse if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) 2492ab9cd1cSSteven Whitehouse goto fail_iput; 2502ab9cd1cSSteven Whitehouse } 2513ce37b2cSAndreas Gruenbacher return inode; 2522ab9cd1cSSteven Whitehouse 2532ab9cd1cSSteven Whitehouse fail_iput: 2542ab9cd1cSSteven Whitehouse iput(inode); 2553ce37b2cSAndreas Gruenbacher return ERR_PTR(error); 2562ab9cd1cSSteven Whitehouse } 2572ab9cd1cSSteven Whitehouse 2582ab9cd1cSSteven Whitehouse 2592ab9cd1cSSteven Whitehouse struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) 2602ab9cd1cSSteven Whitehouse { 2612ab9cd1cSSteven Whitehouse struct qstr qstr; 2622ab9cd1cSSteven Whitehouse struct inode *inode; 2632ab9cd1cSSteven Whitehouse gfs2_str2qstr(&qstr, name); 2642ab9cd1cSSteven Whitehouse inode = gfs2_lookupi(dip, &qstr, 1); 2652ab9cd1cSSteven Whitehouse /* gfs2_lookupi has inconsistent callers: vfs 2662ab9cd1cSSteven Whitehouse * related routines expect NULL for no entry found, 2672ab9cd1cSSteven Whitehouse * gfs2_lookup_simple callers expect ENOENT 2682ab9cd1cSSteven Whitehouse * and do not check for NULL. 2692ab9cd1cSSteven Whitehouse */ 2702ab9cd1cSSteven Whitehouse if (inode == NULL) 2712ab9cd1cSSteven Whitehouse return ERR_PTR(-ENOENT); 2722ab9cd1cSSteven Whitehouse else 2732ab9cd1cSSteven Whitehouse return inode; 2742ab9cd1cSSteven Whitehouse } 2752ab9cd1cSSteven Whitehouse 2762ab9cd1cSSteven Whitehouse 2772ab9cd1cSSteven Whitehouse /** 2782ab9cd1cSSteven Whitehouse * gfs2_lookupi - Look up a filename in a directory and return its inode 279c551f66cSLee Jones * @dir: The inode of the directory containing the inode to look-up 2802ab9cd1cSSteven Whitehouse * @name: The name of the inode to look for 2812ab9cd1cSSteven Whitehouse * @is_root: If 1, ignore the caller's permissions 2822ab9cd1cSSteven Whitehouse * 2832ab9cd1cSSteven Whitehouse * This can be called via the VFS filldir function when NFS is doing 2842ab9cd1cSSteven Whitehouse * a readdirplus and the inode which its intending to stat isn't 2852ab9cd1cSSteven Whitehouse * already in cache. In this case we must not take the directory glock 2862ab9cd1cSSteven Whitehouse * again, since the readdir call will have already taken that lock. 2872ab9cd1cSSteven Whitehouse * 2882ab9cd1cSSteven Whitehouse * Returns: errno 2892ab9cd1cSSteven Whitehouse */ 2902ab9cd1cSSteven Whitehouse 2912ab9cd1cSSteven Whitehouse struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, 2922ab9cd1cSSteven Whitehouse int is_root) 2932ab9cd1cSSteven Whitehouse { 2942ab9cd1cSSteven Whitehouse struct super_block *sb = dir->i_sb; 2952ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 2962ab9cd1cSSteven Whitehouse struct gfs2_holder d_gh; 2972ab9cd1cSSteven Whitehouse int error = 0; 2982ab9cd1cSSteven Whitehouse struct inode *inode = NULL; 2992ab9cd1cSSteven Whitehouse 3006df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&d_gh); 3012ab9cd1cSSteven Whitehouse if (!name->len || name->len > GFS2_FNAMESIZE) 3022ab9cd1cSSteven Whitehouse return ERR_PTR(-ENAMETOOLONG); 3032ab9cd1cSSteven Whitehouse 3042ab9cd1cSSteven Whitehouse if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || 3052ab9cd1cSSteven Whitehouse (name->len == 2 && memcmp(name->name, "..", 2) == 0 && 3062b0143b5SDavid Howells dir == d_inode(sb->s_root))) { 3072ab9cd1cSSteven Whitehouse igrab(dir); 3082ab9cd1cSSteven Whitehouse return dir; 3092ab9cd1cSSteven Whitehouse } 3102ab9cd1cSSteven Whitehouse 3112ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) { 3122ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); 3132ab9cd1cSSteven Whitehouse if (error) 3142ab9cd1cSSteven Whitehouse return ERR_PTR(error); 3152ab9cd1cSSteven Whitehouse } 3162ab9cd1cSSteven Whitehouse 3172ab9cd1cSSteven Whitehouse if (!is_root) { 318549c7297SChristian Brauner error = gfs2_permission(&init_user_ns, dir, MAY_EXEC); 3192ab9cd1cSSteven Whitehouse if (error) 3202ab9cd1cSSteven Whitehouse goto out; 3212ab9cd1cSSteven Whitehouse } 3222ab9cd1cSSteven Whitehouse 3235a00f3ccSSteven Whitehouse inode = gfs2_dir_search(dir, name, false); 3242ab9cd1cSSteven Whitehouse if (IS_ERR(inode)) 3252ab9cd1cSSteven Whitehouse error = PTR_ERR(inode); 3262ab9cd1cSSteven Whitehouse out: 3276df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&d_gh)) 3282ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&d_gh); 3292ab9cd1cSSteven Whitehouse if (error == -ENOENT) 3302ab9cd1cSSteven Whitehouse return NULL; 3312ab9cd1cSSteven Whitehouse return inode ? inode : ERR_PTR(error); 3322ab9cd1cSSteven Whitehouse } 3332ab9cd1cSSteven Whitehouse 3342ab9cd1cSSteven Whitehouse /** 3352ab9cd1cSSteven Whitehouse * create_ok - OK to create a new on-disk inode here? 3362ab9cd1cSSteven Whitehouse * @dip: Directory in which dinode is to be created 3372ab9cd1cSSteven Whitehouse * @name: Name of new dinode 3382ab9cd1cSSteven Whitehouse * @mode: 3392ab9cd1cSSteven Whitehouse * 3402ab9cd1cSSteven Whitehouse * Returns: errno 3412ab9cd1cSSteven Whitehouse */ 3422ab9cd1cSSteven Whitehouse 3432ab9cd1cSSteven Whitehouse static int create_ok(struct gfs2_inode *dip, const struct qstr *name, 344175a4eb7SAl Viro umode_t mode) 3452ab9cd1cSSteven Whitehouse { 3462ab9cd1cSSteven Whitehouse int error; 3472ab9cd1cSSteven Whitehouse 348549c7297SChristian Brauner error = gfs2_permission(&init_user_ns, &dip->i_inode, 349549c7297SChristian Brauner MAY_WRITE | MAY_EXEC); 3502ab9cd1cSSteven Whitehouse if (error) 3512ab9cd1cSSteven Whitehouse return error; 3522ab9cd1cSSteven Whitehouse 3532ab9cd1cSSteven Whitehouse /* Don't create entries in an unlinked directory */ 3542ab9cd1cSSteven Whitehouse if (!dip->i_inode.i_nlink) 3552ab9cd1cSSteven Whitehouse return -ENOENT; 3562ab9cd1cSSteven Whitehouse 3572ab9cd1cSSteven Whitehouse if (dip->i_entries == (u32)-1) 3582ab9cd1cSSteven Whitehouse return -EFBIG; 3592ab9cd1cSSteven Whitehouse if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) 3602ab9cd1cSSteven Whitehouse return -EMLINK; 3612ab9cd1cSSteven Whitehouse 3622ab9cd1cSSteven Whitehouse return 0; 3632ab9cd1cSSteven Whitehouse } 3642ab9cd1cSSteven Whitehouse 365c9aecf73SSteven Whitehouse static void munge_mode_uid_gid(const struct gfs2_inode *dip, 366c9aecf73SSteven Whitehouse struct inode *inode) 3672ab9cd1cSSteven Whitehouse { 3682ab9cd1cSSteven Whitehouse if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && 3696b24c0d2SEric W. Biederman (dip->i_inode.i_mode & S_ISUID) && 3706b24c0d2SEric W. Biederman !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) { 371c9aecf73SSteven Whitehouse if (S_ISDIR(inode->i_mode)) 372c9aecf73SSteven Whitehouse inode->i_mode |= S_ISUID; 3736b24c0d2SEric W. Biederman else if (!uid_eq(dip->i_inode.i_uid, current_fsuid())) 374c9aecf73SSteven Whitehouse inode->i_mode &= ~07111; 375c9aecf73SSteven Whitehouse inode->i_uid = dip->i_inode.i_uid; 3762ab9cd1cSSteven Whitehouse } else 377c9aecf73SSteven Whitehouse inode->i_uid = current_fsuid(); 3782ab9cd1cSSteven Whitehouse 3792ab9cd1cSSteven Whitehouse if (dip->i_inode.i_mode & S_ISGID) { 380c9aecf73SSteven Whitehouse if (S_ISDIR(inode->i_mode)) 381c9aecf73SSteven Whitehouse inode->i_mode |= S_ISGID; 382c9aecf73SSteven Whitehouse inode->i_gid = dip->i_inode.i_gid; 3832ab9cd1cSSteven Whitehouse } else 384c9aecf73SSteven Whitehouse inode->i_gid = current_fsgid(); 3852ab9cd1cSSteven Whitehouse } 3862ab9cd1cSSteven Whitehouse 387b2c8b3eaSSteven Whitehouse static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks) 3882ab9cd1cSSteven Whitehouse { 389c9aecf73SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 390b2c8b3eaSSteven Whitehouse struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, }; 3912ab9cd1cSSteven Whitehouse int error; 3922ab9cd1cSSteven Whitehouse 393b8fbf471SAbhi Das error = gfs2_quota_lock_check(ip, &ap); 3942ab9cd1cSSteven Whitehouse if (error) 3952ab9cd1cSSteven Whitehouse goto out; 3962ab9cd1cSSteven Whitehouse 3977b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(ip, &ap); 398fd4b4e04SSteven Whitehouse if (error) 399fd4b4e04SSteven Whitehouse goto out_quota; 400fd4b4e04SSteven Whitehouse 401b2c8b3eaSSteven Whitehouse error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0); 4022ab9cd1cSSteven Whitehouse if (error) 4032ab9cd1cSSteven Whitehouse goto out_ipreserv; 4042ab9cd1cSSteven Whitehouse 405b2c8b3eaSSteven Whitehouse error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation); 406c9aecf73SSteven Whitehouse ip->i_no_formal_ino = ip->i_generation; 407c9aecf73SSteven Whitehouse ip->i_inode.i_ino = ip->i_no_addr; 408c9aecf73SSteven Whitehouse ip->i_goal = ip->i_no_addr; 4092ab9cd1cSSteven Whitehouse 4102ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 4112ab9cd1cSSteven Whitehouse 4122ab9cd1cSSteven Whitehouse out_ipreserv: 413c9aecf73SSteven Whitehouse gfs2_inplace_release(ip); 414fd4b4e04SSteven Whitehouse out_quota: 415fd4b4e04SSteven Whitehouse gfs2_quota_unlock(ip); 4162ab9cd1cSSteven Whitehouse out: 4172ab9cd1cSSteven Whitehouse return error; 4182ab9cd1cSSteven Whitehouse } 4192ab9cd1cSSteven Whitehouse 420f2741d98SSteven Whitehouse static void gfs2_init_dir(struct buffer_head *dibh, 421f2741d98SSteven Whitehouse const struct gfs2_inode *parent) 422e2d0a13bSSteven Whitehouse { 423e2d0a13bSSteven Whitehouse struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data; 424e2d0a13bSSteven Whitehouse struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1); 425e2d0a13bSSteven Whitehouse 426e2d0a13bSSteven Whitehouse gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent); 427e2d0a13bSSteven Whitehouse dent->de_inum = di->di_num; /* already GFS2 endian */ 428e2d0a13bSSteven Whitehouse dent->de_type = cpu_to_be16(DT_DIR); 429e2d0a13bSSteven Whitehouse 430e2d0a13bSSteven Whitehouse dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1)); 431e2d0a13bSSteven Whitehouse gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent); 432e2d0a13bSSteven Whitehouse gfs2_inum_out(parent, dent); 433e2d0a13bSSteven Whitehouse dent->de_type = cpu_to_be16(DT_DIR); 434e2d0a13bSSteven Whitehouse 435e2d0a13bSSteven Whitehouse } 436e2d0a13bSSteven Whitehouse 4372ab9cd1cSSteven Whitehouse /** 438b2c8b3eaSSteven Whitehouse * gfs2_init_xattr - Initialise an xattr block for a new inode 439b2c8b3eaSSteven Whitehouse * @ip: The inode in question 440b2c8b3eaSSteven Whitehouse * 441b2c8b3eaSSteven Whitehouse * This sets up an empty xattr block for a new inode, ready to 442b2c8b3eaSSteven Whitehouse * take any ACLs, LSM xattrs, etc. 443b2c8b3eaSSteven Whitehouse */ 444b2c8b3eaSSteven Whitehouse 445b2c8b3eaSSteven Whitehouse static void gfs2_init_xattr(struct gfs2_inode *ip) 446b2c8b3eaSSteven Whitehouse { 447b2c8b3eaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 448b2c8b3eaSSteven Whitehouse struct buffer_head *bh; 449b2c8b3eaSSteven Whitehouse struct gfs2_ea_header *ea; 450b2c8b3eaSSteven Whitehouse 451b2c8b3eaSSteven Whitehouse bh = gfs2_meta_new(ip->i_gl, ip->i_eattr); 452b2c8b3eaSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, bh); 453b2c8b3eaSSteven Whitehouse gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA); 454b2c8b3eaSSteven Whitehouse gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header)); 455b2c8b3eaSSteven Whitehouse 456b2c8b3eaSSteven Whitehouse ea = GFS2_EA_BH2FIRST(bh); 457b2c8b3eaSSteven Whitehouse ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); 458b2c8b3eaSSteven Whitehouse ea->ea_type = GFS2_EATYPE_UNUSED; 459b2c8b3eaSSteven Whitehouse ea->ea_flags = GFS2_EAFLAG_LAST; 460b2c8b3eaSSteven Whitehouse 461b2c8b3eaSSteven Whitehouse brelse(bh); 462b2c8b3eaSSteven Whitehouse } 463b2c8b3eaSSteven Whitehouse 464b2c8b3eaSSteven Whitehouse /** 4652ab9cd1cSSteven Whitehouse * init_dinode - Fill in a new dinode structure 466f2741d98SSteven Whitehouse * @dip: The directory this inode is being created in 467c9aecf73SSteven Whitehouse * @ip: The inode 468f2741d98SSteven Whitehouse * @symname: The symlink destination (if a symlink) 4692ab9cd1cSSteven Whitehouse * 4702ab9cd1cSSteven Whitehouse */ 4712ab9cd1cSSteven Whitehouse 472c9aecf73SSteven Whitehouse static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip, 47379ba7480SSteven Whitehouse const char *symname) 4742ab9cd1cSSteven Whitehouse { 4752ab9cd1cSSteven Whitehouse struct gfs2_dinode *di; 4762ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 4772ab9cd1cSSteven Whitehouse 478c9aecf73SSteven Whitehouse dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr); 479350a9b0aSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, dibh); 4802ab9cd1cSSteven Whitehouse di = (struct gfs2_dinode *)dibh->b_data; 48179ba7480SSteven Whitehouse gfs2_dinode_out(ip, di); 4822ab9cd1cSSteven Whitehouse 4836f24784fSAl Viro di->di_major = cpu_to_be32(imajor(&ip->i_inode)); 4846f24784fSAl Viro di->di_minor = cpu_to_be32(iminor(&ip->i_inode)); 4852ab9cd1cSSteven Whitehouse di->__pad1 = 0; 4862ab9cd1cSSteven Whitehouse di->__pad2 = 0; 4872ab9cd1cSSteven Whitehouse di->__pad3 = 0; 4882ab9cd1cSSteven Whitehouse memset(&di->__pad4, 0, sizeof(di->__pad4)); 4892ab9cd1cSSteven Whitehouse memset(&di->di_reserved, 0, sizeof(di->di_reserved)); 49079ba7480SSteven Whitehouse gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); 4912ab9cd1cSSteven Whitehouse 492c9aecf73SSteven Whitehouse switch(ip->i_inode.i_mode & S_IFMT) { 493160b4026SSteven Whitehouse case S_IFDIR: 494e2d0a13bSSteven Whitehouse gfs2_init_dir(dibh, dip); 495160b4026SSteven Whitehouse break; 496160b4026SSteven Whitehouse case S_IFLNK: 497c9aecf73SSteven Whitehouse memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size); 498160b4026SSteven Whitehouse break; 499e2d0a13bSSteven Whitehouse } 500e2d0a13bSSteven Whitehouse 5012ab9cd1cSSteven Whitehouse set_buffer_uptodate(dibh); 50279ba7480SSteven Whitehouse brelse(dibh); 5032ab9cd1cSSteven Whitehouse } 5042ab9cd1cSSteven Whitehouse 505534cf9caSSteven Whitehouse /** 506c551f66cSLee Jones * gfs2_trans_da_blks - Calculate number of blocks to link inode 507534cf9caSSteven Whitehouse * @dip: The directory we are linking into 508534cf9caSSteven Whitehouse * @da: The dir add information 509534cf9caSSteven Whitehouse * @nr_inodes: The number of inodes involved 510534cf9caSSteven Whitehouse * 511534cf9caSSteven Whitehouse * This calculate the number of blocks we need to reserve in a 512534cf9caSSteven Whitehouse * transaction to link @nr_inodes into a directory. In most cases 513534cf9caSSteven Whitehouse * @nr_inodes will be 2 (the directory plus the inode being linked in) 514534cf9caSSteven Whitehouse * but in case of rename, 4 may be required. 515534cf9caSSteven Whitehouse * 516534cf9caSSteven Whitehouse * Returns: Number of blocks 517534cf9caSSteven Whitehouse */ 518534cf9caSSteven Whitehouse 519534cf9caSSteven Whitehouse static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip, 520534cf9caSSteven Whitehouse const struct gfs2_diradd *da, 521534cf9caSSteven Whitehouse unsigned nr_inodes) 522534cf9caSSteven Whitehouse { 523534cf9caSSteven Whitehouse return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) + 524534cf9caSSteven Whitehouse (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS; 525534cf9caSSteven Whitehouse } 526534cf9caSSteven Whitehouse 5272ab9cd1cSSteven Whitehouse static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, 5283c1c0ae1SSteven Whitehouse struct gfs2_inode *ip, struct gfs2_diradd *da) 5292ab9cd1cSSteven Whitehouse { 5302ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 5313c1c0ae1SSteven Whitehouse struct gfs2_alloc_parms ap = { .target = da->nr_blocks, }; 5322ab9cd1cSSteven Whitehouse int error; 5332ab9cd1cSSteven Whitehouse 5343c1c0ae1SSteven Whitehouse if (da->nr_blocks) { 535b8fbf471SAbhi Das error = gfs2_quota_lock_check(dip, &ap); 5362ab9cd1cSSteven Whitehouse if (error) 5372ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5382ab9cd1cSSteven Whitehouse 5397b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(dip, &ap); 5402ab9cd1cSSteven Whitehouse if (error) 5412ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5422ab9cd1cSSteven Whitehouse 543534cf9caSSteven Whitehouse error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0); 5442ab9cd1cSSteven Whitehouse if (error) 5452ab9cd1cSSteven Whitehouse goto fail_ipreserv; 5462ab9cd1cSSteven Whitehouse } else { 5472ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); 5482ab9cd1cSSteven Whitehouse if (error) 5492ab9cd1cSSteven Whitehouse goto fail_quota_locks; 5502ab9cd1cSSteven Whitehouse } 5512ab9cd1cSSteven Whitehouse 5522b47dad8SSteven Whitehouse error = gfs2_dir_add(&dip->i_inode, name, ip, da); 5532ab9cd1cSSteven Whitehouse 5542ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 5552ab9cd1cSSteven Whitehouse fail_ipreserv: 5562ab9cd1cSSteven Whitehouse gfs2_inplace_release(dip); 5572ab9cd1cSSteven Whitehouse fail_quota_locks: 5582ab9cd1cSSteven Whitehouse gfs2_quota_unlock(dip); 5592ab9cd1cSSteven Whitehouse return error; 5602ab9cd1cSSteven Whitehouse } 5612ab9cd1cSSteven Whitehouse 56246cc1e5fSH Hartley Sweeten static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, 5639d8f13baSMimi Zohar void *fs_info) 5642ab9cd1cSSteven Whitehouse { 5659d8f13baSMimi Zohar const struct xattr *xattr; 5669d8f13baSMimi Zohar int err = 0; 5672ab9cd1cSSteven Whitehouse 5689d8f13baSMimi Zohar for (xattr = xattr_array; xattr->name != NULL; xattr++) { 5699d8f13baSMimi Zohar err = __gfs2_xattr_set(inode, xattr->name, xattr->value, 5709d8f13baSMimi Zohar xattr->value_len, 0, 5719d8f13baSMimi Zohar GFS2_EATYPE_SECURITY); 5729d8f13baSMimi Zohar if (err < 0) 5739d8f13baSMimi Zohar break; 5749d8f13baSMimi Zohar } 5752ab9cd1cSSteven Whitehouse return err; 5762ab9cd1cSSteven Whitehouse } 5772ab9cd1cSSteven Whitehouse 5782ab9cd1cSSteven Whitehouse /** 579f2741d98SSteven Whitehouse * gfs2_create_inode - Create a new inode 580f2741d98SSteven Whitehouse * @dir: The parent directory 581f2741d98SSteven Whitehouse * @dentry: The new dentry 5826d4ade98SSteven Whitehouse * @file: If non-NULL, the file which is being opened 583f2741d98SSteven Whitehouse * @mode: The permissions on the new inode 584f2741d98SSteven Whitehouse * @dev: For device nodes, this is the device number 585f2741d98SSteven Whitehouse * @symname: For symlinks, this is the link destination 586f2741d98SSteven Whitehouse * @size: The initial size of the inode (ignored for directories) 587c551f66cSLee Jones * @excl: Force fail if inode exists 5882ab9cd1cSSteven Whitehouse * 589f2741d98SSteven Whitehouse * Returns: 0 on success, or error code 5902ab9cd1cSSteven Whitehouse */ 5912ab9cd1cSSteven Whitehouse 592f2741d98SSteven Whitehouse static int gfs2_create_inode(struct inode *dir, struct dentry *dentry, 5936d4ade98SSteven Whitehouse struct file *file, 594175a4eb7SAl Viro umode_t mode, dev_t dev, const char *symname, 595b452a458SAl Viro unsigned int size, int excl) 5962ab9cd1cSSteven Whitehouse { 597f2741d98SSteven Whitehouse const struct qstr *name = &dentry->d_name; 598e01580bfSChristoph Hellwig struct posix_acl *default_acl, *acl; 599f2741d98SSteven Whitehouse struct gfs2_holder ghs[2]; 6002ab9cd1cSSteven Whitehouse struct inode *inode = NULL; 6018e2e0047SBob Peterson struct gfs2_inode *dip = GFS2_I(dir), *ip; 6022ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); 603a55a47a3SAndreas Gruenbacher struct gfs2_glock *io_gl; 604783013c0SBob Peterson int error, free_vfs_inode = 1; 6059dbe9610SSteven Whitehouse u32 aflags = 0; 606b2c8b3eaSSteven Whitehouse unsigned blocks = 1; 60719aeb5a6SBob Peterson struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; 6082ab9cd1cSSteven Whitehouse 6092ab9cd1cSSteven Whitehouse if (!name->len || name->len > GFS2_FNAMESIZE) 610f2741d98SSteven Whitehouse return -ENAMETOOLONG; 6112ab9cd1cSSteven Whitehouse 6122fba46a0SBob Peterson error = gfs2_qa_get(dip); 6130a305e49SBob Peterson if (error) 6140a305e49SBob Peterson return error; 6150a305e49SBob Peterson 616fd4b4e04SSteven Whitehouse error = gfs2_rindex_update(sdp); 617fd4b4e04SSteven Whitehouse if (error) 6182fba46a0SBob Peterson goto fail; 619fd4b4e04SSteven Whitehouse 620f2741d98SSteven Whitehouse error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 6212ab9cd1cSSteven Whitehouse if (error) 6222ab9cd1cSSteven Whitehouse goto fail; 623e0b62e21SAndreas Gruenbacher gfs2_holder_mark_uninitialized(ghs + 1); 6242ab9cd1cSSteven Whitehouse 6252ab9cd1cSSteven Whitehouse error = create_ok(dip, name, mode); 6262ab9cd1cSSteven Whitehouse if (error) 6272ab9cd1cSSteven Whitehouse goto fail_gunlock; 6282ab9cd1cSSteven Whitehouse 6295a00f3ccSSteven Whitehouse inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl); 6305a00f3ccSSteven Whitehouse error = PTR_ERR(inode); 6315a00f3ccSSteven Whitehouse if (!IS_ERR(inode)) { 632571a4b57SAl Viro if (S_ISDIR(inode->i_mode)) { 633571a4b57SAl Viro iput(inode); 634571a4b57SAl Viro inode = ERR_PTR(-EISDIR); 635571a4b57SAl Viro goto fail_gunlock; 636571a4b57SAl Viro } 63744bb31baSAl Viro d_instantiate(dentry, inode); 6386d4ade98SSteven Whitehouse error = 0; 6390d0d1107SMiklos Szeredi if (file) { 64044bb31baSAl Viro if (S_ISREG(inode->i_mode)) 641be12af3eSAl Viro error = finish_open(file, dentry, gfs2_open_common); 64244bb31baSAl Viro else 64344bb31baSAl Viro error = finish_no_open(file, NULL); 6445ca1db41SMiklos Szeredi } 6455a00f3ccSSteven Whitehouse gfs2_glock_dq_uninit(ghs); 6462297ab61SBob Peterson goto fail; 6475a00f3ccSSteven Whitehouse } else if (error != -ENOENT) { 6485a00f3ccSSteven Whitehouse goto fail_gunlock; 6495a00f3ccSSteven Whitehouse } 6505a00f3ccSSteven Whitehouse 6513c1c0ae1SSteven Whitehouse error = gfs2_diradd_alloc_required(dir, name, &da); 652fd4b4e04SSteven Whitehouse if (error < 0) 653fd4b4e04SSteven Whitehouse goto fail_gunlock; 654fd4b4e04SSteven Whitehouse 655c9aecf73SSteven Whitehouse inode = new_inode(sdp->sd_vfs); 656fd4b4e04SSteven Whitehouse error = -ENOMEM; 657fd4b4e04SSteven Whitehouse if (!inode) 658fd4b4e04SSteven Whitehouse goto fail_gunlock; 659fd4b4e04SSteven Whitehouse 660e01580bfSChristoph Hellwig error = posix_acl_create(dir, &mode, &default_acl, &acl); 661e01580bfSChristoph Hellwig if (error) 662783013c0SBob Peterson goto fail_gunlock; 663e01580bfSChristoph Hellwig 6648e2e0047SBob Peterson ip = GFS2_I(inode); 6652fba46a0SBob Peterson error = gfs2_qa_get(ip); 666ff7f4cb4SSteven Whitehouse if (error) 667e01580bfSChristoph Hellwig goto fail_free_acls; 668c9aecf73SSteven Whitehouse 669c9aecf73SSteven Whitehouse inode->i_mode = mode; 67079ba7480SSteven Whitehouse set_nlink(inode, S_ISDIR(mode) ? 2 : 1); 671c9aecf73SSteven Whitehouse inode->i_rdev = dev; 672c9aecf73SSteven Whitehouse inode->i_size = size; 673078cd827SDeepa Dinamani inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 674c9aecf73SSteven Whitehouse munge_mode_uid_gid(dip, inode); 67500a158beSAbhi Das check_and_update_goal(dip); 676c9aecf73SSteven Whitehouse ip->i_goal = dip->i_goal; 67728fb3027SSteven Whitehouse ip->i_diskflags = 0; 67828fb3027SSteven Whitehouse ip->i_eattr = 0; 67928fb3027SSteven Whitehouse ip->i_height = 0; 68028fb3027SSteven Whitehouse ip->i_depth = 0; 68128fb3027SSteven Whitehouse ip->i_entries = 0; 682cc963a11SBob Peterson ip->i_no_addr = 0; /* Temporarily zero until real addr is assigned */ 68328fb3027SSteven Whitehouse 68428fb3027SSteven Whitehouse switch(mode & S_IFMT) { 68528fb3027SSteven Whitehouse case S_IFREG: 68628fb3027SSteven Whitehouse if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) || 68728fb3027SSteven Whitehouse gfs2_tune_get(sdp, gt_new_files_jdata)) 68828fb3027SSteven Whitehouse ip->i_diskflags |= GFS2_DIF_JDATA; 68928fb3027SSteven Whitehouse gfs2_set_aops(inode); 69028fb3027SSteven Whitehouse break; 69128fb3027SSteven Whitehouse case S_IFDIR: 69228fb3027SSteven Whitehouse ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA); 69328fb3027SSteven Whitehouse ip->i_diskflags |= GFS2_DIF_JDATA; 69428fb3027SSteven Whitehouse ip->i_entries = 2; 69528fb3027SSteven Whitehouse break; 69628fb3027SSteven Whitehouse } 697acc546fdSAbhi Das 698acc546fdSAbhi Das /* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */ 699acc546fdSAbhi Das if (dip->i_diskflags & GFS2_DIF_SYSTEM) 700acc546fdSAbhi Das ip->i_diskflags |= GFS2_DIF_SYSTEM; 701acc546fdSAbhi Das 70228fb3027SSteven Whitehouse gfs2_set_inode_flags(inode); 703c9aecf73SSteven Whitehouse 7042b0143b5SDavid Howells if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) || 7059dbe9610SSteven Whitehouse (dip->i_diskflags & GFS2_DIF_TOPDIR)) 7069dbe9610SSteven Whitehouse aflags |= GFS2_AF_ORLOV; 7079dbe9610SSteven Whitehouse 708b2c8b3eaSSteven Whitehouse if (default_acl || acl) 709b2c8b3eaSSteven Whitehouse blocks++; 710b2c8b3eaSSteven Whitehouse 711b2c8b3eaSSteven Whitehouse error = alloc_dinode(ip, aflags, &blocks); 712c9aecf73SSteven Whitehouse if (error) 713c9aecf73SSteven Whitehouse goto fail_free_inode; 714c9aecf73SSteven Whitehouse 715b2c8b3eaSSteven Whitehouse gfs2_set_inode_blocks(inode, blocks); 716b2c8b3eaSSteven Whitehouse 717c9aecf73SSteven Whitehouse error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); 718c9aecf73SSteven Whitehouse if (error) 719c9aecf73SSteven Whitehouse goto fail_free_inode; 72098e5a91aSAndreas Gruenbacher 721dd0ecf54SAndreas Gruenbacher error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl); 722c9aecf73SSteven Whitehouse if (error) 723c9aecf73SSteven Whitehouse goto fail_free_inode; 724dd0ecf54SAndreas Gruenbacher gfs2_cancel_delete_work(io_gl); 725dd0ecf54SAndreas Gruenbacher 7263d36e57fSAndreas Gruenbacher error = insert_inode_locked4(inode, ip->i_no_addr, iget_test, &ip->i_no_addr); 7273d36e57fSAndreas Gruenbacher BUG_ON(error); 7283d36e57fSAndreas Gruenbacher 729ebdc416cSAndreas Gruenbacher error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT | GL_NOPID, 730ebdc416cSAndreas Gruenbacher &ip->i_iopen_gh); 731dd0ecf54SAndreas Gruenbacher if (error) 732dd0ecf54SAndreas Gruenbacher goto fail_gunlock2; 733c9aecf73SSteven Whitehouse 73429464ee3SAndreas Gruenbacher error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); 73529464ee3SAndreas Gruenbacher if (error) 73629464ee3SAndreas Gruenbacher goto fail_gunlock3; 73729464ee3SAndreas Gruenbacher 738b2c8b3eaSSteven Whitehouse error = gfs2_trans_begin(sdp, blocks, 0); 739c9aecf73SSteven Whitehouse if (error) 74029464ee3SAndreas Gruenbacher goto fail_gunlock3; 7410a305e49SBob Peterson 742b2c8b3eaSSteven Whitehouse if (blocks > 1) { 743b2c8b3eaSSteven Whitehouse ip->i_eattr = ip->i_no_addr + 1; 744b2c8b3eaSSteven Whitehouse gfs2_init_xattr(ip); 745b2c8b3eaSSteven Whitehouse } 74679ba7480SSteven Whitehouse init_dinode(dip, ip, symname); 747fd4b4e04SSteven Whitehouse gfs2_trans_end(sdp); 748fd4b4e04SSteven Whitehouse 7493d36e57fSAndreas Gruenbacher glock_set_object(ip->i_gl, ip); 7508793e149SBob Peterson glock_set_object(io_gl, ip); 751c9aecf73SSteven Whitehouse gfs2_set_iop(inode); 752c9aecf73SSteven Whitehouse 753783013c0SBob Peterson free_vfs_inode = 0; /* After this point, the inode is no longer 754783013c0SBob Peterson considered free. Any failures need to undo 755783013c0SBob Peterson the gfs2 structures. */ 756e01580bfSChristoph Hellwig if (default_acl) { 7571a39ba99SAl Viro error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); 7582ab9cd1cSSteven Whitehouse if (error) 75929464ee3SAndreas Gruenbacher goto fail_gunlock4; 7606ff9b09eSAndreas Gruenbacher posix_acl_release(default_acl); 7616ff9b09eSAndreas Gruenbacher default_acl = NULL; 7626ff9b09eSAndreas Gruenbacher } 7636ff9b09eSAndreas Gruenbacher if (acl) { 7646ff9b09eSAndreas Gruenbacher error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS); 7656ff9b09eSAndreas Gruenbacher if (error) 76629464ee3SAndreas Gruenbacher goto fail_gunlock4; 7676ff9b09eSAndreas Gruenbacher posix_acl_release(acl); 7686ff9b09eSAndreas Gruenbacher acl = NULL; 7696ff9b09eSAndreas Gruenbacher } 7702ab9cd1cSSteven Whitehouse 771f45dc26dSBob Peterson error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name, 772f45dc26dSBob Peterson &gfs2_initxattrs, NULL); 7732ab9cd1cSSteven Whitehouse if (error) 77429464ee3SAndreas Gruenbacher goto fail_gunlock4; 7752ab9cd1cSSteven Whitehouse 7763c1c0ae1SSteven Whitehouse error = link_dinode(dip, name, ip, &da); 7772ab9cd1cSSteven Whitehouse if (error) 77829464ee3SAndreas Gruenbacher goto fail_gunlock4; 7792ab9cd1cSSteven Whitehouse 78079ba7480SSteven Whitehouse mark_inode_dirty(inode); 7816d4ade98SSteven Whitehouse d_instantiate(dentry, inode); 7822c47c1beSBob Peterson /* After instantiate, errors should result in evict which will destroy 7832c47c1beSBob Peterson * both inode and iopen glocks properly. */ 784c5bf8fefSMiklos Szeredi if (file) { 78573a09dd9SAl Viro file->f_mode |= FMODE_CREATED; 786be12af3eSAl Viro error = finish_open(file, dentry, gfs2_open_common); 787c5bf8fefSMiklos Szeredi } 78828fb3027SSteven Whitehouse gfs2_glock_dq_uninit(ghs); 7892297ab61SBob Peterson gfs2_qa_put(ip); 79028fb3027SSteven Whitehouse gfs2_glock_dq_uninit(ghs + 1); 7912c47c1beSBob Peterson gfs2_glock_put(io_gl); 7922297ab61SBob Peterson gfs2_qa_put(dip); 7933d36e57fSAndreas Gruenbacher unlock_new_inode(inode); 7946d4ade98SSteven Whitehouse return error; 7952ab9cd1cSSteven Whitehouse 79629464ee3SAndreas Gruenbacher fail_gunlock4: 7973d36e57fSAndreas Gruenbacher glock_clear_object(ip->i_gl, ip); 7989c1b2808SBob Peterson glock_clear_object(io_gl, ip); 79929464ee3SAndreas Gruenbacher fail_gunlock3: 800783013c0SBob Peterson gfs2_glock_dq_uninit(&ip->i_iopen_gh); 8012ab9cd1cSSteven Whitehouse fail_gunlock2: 8022c47c1beSBob Peterson gfs2_glock_put(io_gl); 803c9aecf73SSteven Whitehouse fail_free_inode: 8049c1b2808SBob Peterson if (ip->i_gl) { 8051a0b00d1SBob Peterson if (free_vfs_inode) /* else evict will do the put for us */ 806c9aecf73SSteven Whitehouse gfs2_glock_put(ip->i_gl); 8079c1b2808SBob Peterson } 8087336905aSAndreas Gruenbacher gfs2_rs_deltree(&ip->i_res); 8091595548fSAndreas Gruenbacher gfs2_qa_put(ip); 810e01580bfSChristoph Hellwig fail_free_acls: 811e01580bfSChristoph Hellwig posix_acl_release(default_acl); 812e01580bfSChristoph Hellwig posix_acl_release(acl); 8132ab9cd1cSSteven Whitehouse fail_gunlock: 8142b47dad8SSteven Whitehouse gfs2_dir_no_add(&da); 815f2741d98SSteven Whitehouse gfs2_glock_dq_uninit(ghs); 81615a798f7SKefeng Wang if (!IS_ERR_OR_NULL(inode)) { 81779ba7480SSteven Whitehouse clear_nlink(inode); 81805978803SAbhi Das if (!free_vfs_inode) 81979ba7480SSteven Whitehouse mark_inode_dirty(inode); 82005978803SAbhi Das set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED, 82105978803SAbhi Das &GFS2_I(inode)->i_flags); 8223d36e57fSAndreas Gruenbacher if (inode->i_state & I_NEW) 8233d36e57fSAndreas Gruenbacher iget_failed(inode); 8243d36e57fSAndreas Gruenbacher else 82540ac218fSSteven Whitehouse iput(inode); 82640ac218fSSteven Whitehouse } 827e0b62e21SAndreas Gruenbacher if (gfs2_holder_initialized(ghs + 1)) 828e0b62e21SAndreas Gruenbacher gfs2_glock_dq_uninit(ghs + 1); 8292ab9cd1cSSteven Whitehouse fail: 8302fba46a0SBob Peterson gfs2_qa_put(dip); 831f2741d98SSteven Whitehouse return error; 8322ab9cd1cSSteven Whitehouse } 833f2741d98SSteven Whitehouse 8342ab9cd1cSSteven Whitehouse /** 8352ab9cd1cSSteven Whitehouse * gfs2_create - Create a file 836c551f66cSLee Jones * @mnt_userns: User namespace of the mount the inode was found from 8372ab9cd1cSSteven Whitehouse * @dir: The directory in which to create the file 8382ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new file 8392ab9cd1cSSteven Whitehouse * @mode: The mode of the new file 840c551f66cSLee Jones * @excl: Force fail if inode exists 8412ab9cd1cSSteven Whitehouse * 8422ab9cd1cSSteven Whitehouse * Returns: errno 8432ab9cd1cSSteven Whitehouse */ 8442ab9cd1cSSteven Whitehouse 845549c7297SChristian Brauner static int gfs2_create(struct user_namespace *mnt_userns, struct inode *dir, 846549c7297SChristian Brauner struct dentry *dentry, umode_t mode, bool excl) 8472ab9cd1cSSteven Whitehouse { 848b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl); 8492ab9cd1cSSteven Whitehouse } 8502ab9cd1cSSteven Whitehouse 8512ab9cd1cSSteven Whitehouse /** 8526d4ade98SSteven Whitehouse * __gfs2_lookup - Look up a filename in a directory and return its inode 8532ab9cd1cSSteven Whitehouse * @dir: The directory inode 8542ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new inode 8556d4ade98SSteven Whitehouse * @file: File to be opened 8562ab9cd1cSSteven Whitehouse * 8572ab9cd1cSSteven Whitehouse * 8582ab9cd1cSSteven Whitehouse * Returns: errno 8592ab9cd1cSSteven Whitehouse */ 8602ab9cd1cSSteven Whitehouse 8616d4ade98SSteven Whitehouse static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry, 862b452a458SAl Viro struct file *file) 8632ab9cd1cSSteven Whitehouse { 8646d4ade98SSteven Whitehouse struct inode *inode; 8656d4ade98SSteven Whitehouse struct dentry *d; 8662ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 8676d4ade98SSteven Whitehouse struct gfs2_glock *gl; 8682ab9cd1cSSteven Whitehouse int error; 8696d4ade98SSteven Whitehouse 8706d4ade98SSteven Whitehouse inode = gfs2_lookupi(dir, &dentry->d_name, 0); 8717b7a9115SBenjamin Coddington if (inode == NULL) { 8727b7a9115SBenjamin Coddington d_add(dentry, NULL); 8736d4ade98SSteven Whitehouse return NULL; 8747b7a9115SBenjamin Coddington } 8756d4ade98SSteven Whitehouse if (IS_ERR(inode)) 8766d4ade98SSteven Whitehouse return ERR_CAST(inode); 8776d4ade98SSteven Whitehouse 8786d4ade98SSteven Whitehouse gl = GFS2_I(inode)->i_gl; 8792ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 8802ab9cd1cSSteven Whitehouse if (error) { 8812ab9cd1cSSteven Whitehouse iput(inode); 8822ab9cd1cSSteven Whitehouse return ERR_PTR(error); 8832ab9cd1cSSteven Whitehouse } 8846d4ade98SSteven Whitehouse 8856d4ade98SSteven Whitehouse d = d_splice_alias(inode, dentry); 886d57b9c9aSJ. Bruce Fields if (IS_ERR(d)) { 887d57b9c9aSJ. Bruce Fields gfs2_glock_dq_uninit(&gh); 888d57b9c9aSJ. Bruce Fields return d; 889d57b9c9aSJ. Bruce Fields } 8906d4ade98SSteven Whitehouse if (file && S_ISREG(inode->i_mode)) 891be12af3eSAl Viro error = finish_open(file, dentry, gfs2_open_common); 8926d4ade98SSteven Whitehouse 8932ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 8945ca1db41SMiklos Szeredi if (error) { 8955ca1db41SMiklos Szeredi dput(d); 8966d4ade98SSteven Whitehouse return ERR_PTR(error); 8975ca1db41SMiklos Szeredi } 8986d4ade98SSteven Whitehouse return d; 8992ab9cd1cSSteven Whitehouse } 9006d4ade98SSteven Whitehouse 9016d4ade98SSteven Whitehouse static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry, 9026d4ade98SSteven Whitehouse unsigned flags) 9036d4ade98SSteven Whitehouse { 904b452a458SAl Viro return __gfs2_lookup(dir, dentry, NULL); 9052ab9cd1cSSteven Whitehouse } 9062ab9cd1cSSteven Whitehouse 9072ab9cd1cSSteven Whitehouse /** 9082ab9cd1cSSteven Whitehouse * gfs2_link - Link to a file 9092ab9cd1cSSteven Whitehouse * @old_dentry: The inode to link 9102ab9cd1cSSteven Whitehouse * @dir: Add link to this directory 9112ab9cd1cSSteven Whitehouse * @dentry: The name of the link 9122ab9cd1cSSteven Whitehouse * 9132ab9cd1cSSteven Whitehouse * Link the inode in "old_dentry" into the directory "dir" with the 9142ab9cd1cSSteven Whitehouse * name in "dentry". 9152ab9cd1cSSteven Whitehouse * 9162ab9cd1cSSteven Whitehouse * Returns: errno 9172ab9cd1cSSteven Whitehouse */ 9182ab9cd1cSSteven Whitehouse 9192ab9cd1cSSteven Whitehouse static int gfs2_link(struct dentry *old_dentry, struct inode *dir, 9202ab9cd1cSSteven Whitehouse struct dentry *dentry) 9212ab9cd1cSSteven Whitehouse { 9222ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 9232ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 9242b0143b5SDavid Howells struct inode *inode = d_inode(old_dentry); 9252ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 9262ab9cd1cSSteven Whitehouse struct gfs2_holder ghs[2]; 9272ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 92819aeb5a6SBob Peterson struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, }; 9292ab9cd1cSSteven Whitehouse int error; 9302ab9cd1cSSteven Whitehouse 9312ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) 9322ab9cd1cSSteven Whitehouse return -EPERM; 9332ab9cd1cSSteven Whitehouse 9342fba46a0SBob Peterson error = gfs2_qa_get(dip); 9350a305e49SBob Peterson if (error) 9360a305e49SBob Peterson return error; 9370a305e49SBob Peterson 9382ab9cd1cSSteven Whitehouse gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 9392ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 9402ab9cd1cSSteven Whitehouse 9412ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs); /* parent */ 9422ab9cd1cSSteven Whitehouse if (error) 9432ab9cd1cSSteven Whitehouse goto out_parent; 9442ab9cd1cSSteven Whitehouse 9452ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 1); /* child */ 9462ab9cd1cSSteven Whitehouse if (error) 9472ab9cd1cSSteven Whitehouse goto out_child; 9482ab9cd1cSSteven Whitehouse 9492ab9cd1cSSteven Whitehouse error = -ENOENT; 9502ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 9512ab9cd1cSSteven Whitehouse goto out_gunlock; 9522ab9cd1cSSteven Whitehouse 953549c7297SChristian Brauner error = gfs2_permission(&init_user_ns, dir, MAY_WRITE | MAY_EXEC); 9542ab9cd1cSSteven Whitehouse if (error) 9552ab9cd1cSSteven Whitehouse goto out_gunlock; 9562ab9cd1cSSteven Whitehouse 9572ab9cd1cSSteven Whitehouse error = gfs2_dir_check(dir, &dentry->d_name, NULL); 9582ab9cd1cSSteven Whitehouse switch (error) { 9592ab9cd1cSSteven Whitehouse case -ENOENT: 9602ab9cd1cSSteven Whitehouse break; 9612ab9cd1cSSteven Whitehouse case 0: 9622ab9cd1cSSteven Whitehouse error = -EEXIST; 963e5966cf2SGustavo A. R. Silva goto out_gunlock; 9642ab9cd1cSSteven Whitehouse default: 9652ab9cd1cSSteven Whitehouse goto out_gunlock; 9662ab9cd1cSSteven Whitehouse } 9672ab9cd1cSSteven Whitehouse 9682ab9cd1cSSteven Whitehouse error = -EINVAL; 9692ab9cd1cSSteven Whitehouse if (!dip->i_inode.i_nlink) 9702ab9cd1cSSteven Whitehouse goto out_gunlock; 9712ab9cd1cSSteven Whitehouse error = -EFBIG; 9722ab9cd1cSSteven Whitehouse if (dip->i_entries == (u32)-1) 9732ab9cd1cSSteven Whitehouse goto out_gunlock; 9742ab9cd1cSSteven Whitehouse error = -EPERM; 9752ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) 9762ab9cd1cSSteven Whitehouse goto out_gunlock; 9772ab9cd1cSSteven Whitehouse error = -EINVAL; 9782ab9cd1cSSteven Whitehouse if (!ip->i_inode.i_nlink) 9792ab9cd1cSSteven Whitehouse goto out_gunlock; 9802ab9cd1cSSteven Whitehouse error = -EMLINK; 9812ab9cd1cSSteven Whitehouse if (ip->i_inode.i_nlink == (u32)-1) 9822ab9cd1cSSteven Whitehouse goto out_gunlock; 9832ab9cd1cSSteven Whitehouse 9843c1c0ae1SSteven Whitehouse error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da); 9852ab9cd1cSSteven Whitehouse if (error < 0) 9862ab9cd1cSSteven Whitehouse goto out_gunlock; 9872ab9cd1cSSteven Whitehouse 9883c1c0ae1SSteven Whitehouse if (da.nr_blocks) { 9893c1c0ae1SSteven Whitehouse struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; 990b8fbf471SAbhi Das error = gfs2_quota_lock_check(dip, &ap); 9912ab9cd1cSSteven Whitehouse if (error) 9925407e242SBob Peterson goto out_gunlock; 9932ab9cd1cSSteven Whitehouse 9947b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(dip, &ap); 9952ab9cd1cSSteven Whitehouse if (error) 9962ab9cd1cSSteven Whitehouse goto out_gunlock_q; 9972ab9cd1cSSteven Whitehouse 998534cf9caSSteven Whitehouse error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0); 9992ab9cd1cSSteven Whitehouse if (error) 10002ab9cd1cSSteven Whitehouse goto out_ipres; 10012ab9cd1cSSteven Whitehouse } else { 10022ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0); 10032ab9cd1cSSteven Whitehouse if (error) 10042ab9cd1cSSteven Whitehouse goto out_ipres; 10052ab9cd1cSSteven Whitehouse } 10062ab9cd1cSSteven Whitehouse 10072ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 10082ab9cd1cSSteven Whitehouse if (error) 10092ab9cd1cSSteven Whitehouse goto out_end_trans; 10102ab9cd1cSSteven Whitehouse 10112b47dad8SSteven Whitehouse error = gfs2_dir_add(dir, &dentry->d_name, ip, &da); 10122ab9cd1cSSteven Whitehouse if (error) 10132ab9cd1cSSteven Whitehouse goto out_brelse; 10142ab9cd1cSSteven Whitehouse 1015350a9b0aSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, dibh); 10162ab9cd1cSSteven Whitehouse inc_nlink(&ip->i_inode); 1017078cd827SDeepa Dinamani ip->i_inode.i_ctime = current_time(&ip->i_inode); 1018ab9bbda0SSteven Whitehouse ihold(inode); 1019ab9bbda0SSteven Whitehouse d_instantiate(dentry, inode); 1020ab9bbda0SSteven Whitehouse mark_inode_dirty(inode); 10212ab9cd1cSSteven Whitehouse 10222ab9cd1cSSteven Whitehouse out_brelse: 10232ab9cd1cSSteven Whitehouse brelse(dibh); 10242ab9cd1cSSteven Whitehouse out_end_trans: 10252ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 10262ab9cd1cSSteven Whitehouse out_ipres: 10273c1c0ae1SSteven Whitehouse if (da.nr_blocks) 10282ab9cd1cSSteven Whitehouse gfs2_inplace_release(dip); 10292ab9cd1cSSteven Whitehouse out_gunlock_q: 10303c1c0ae1SSteven Whitehouse if (da.nr_blocks) 10312ab9cd1cSSteven Whitehouse gfs2_quota_unlock(dip); 10322ab9cd1cSSteven Whitehouse out_gunlock: 10332b47dad8SSteven Whitehouse gfs2_dir_no_add(&da); 10342ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 1); 10352ab9cd1cSSteven Whitehouse out_child: 10362ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs); 10372ab9cd1cSSteven Whitehouse out_parent: 10382297ab61SBob Peterson gfs2_qa_put(dip); 10392ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs); 10402ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs + 1); 10412ab9cd1cSSteven Whitehouse return error; 10422ab9cd1cSSteven Whitehouse } 10432ab9cd1cSSteven Whitehouse 10442ab9cd1cSSteven Whitehouse /* 10452ab9cd1cSSteven Whitehouse * gfs2_unlink_ok - check to see that a inode is still in a directory 10462ab9cd1cSSteven Whitehouse * @dip: the directory 10472ab9cd1cSSteven Whitehouse * @name: the name of the file 10482ab9cd1cSSteven Whitehouse * @ip: the inode 10492ab9cd1cSSteven Whitehouse * 10502ab9cd1cSSteven Whitehouse * Assumes that the lock on (at least) @dip is held. 10512ab9cd1cSSteven Whitehouse * 10522ab9cd1cSSteven Whitehouse * Returns: 0 if the parent/child relationship is correct, errno if it isn't 10532ab9cd1cSSteven Whitehouse */ 10542ab9cd1cSSteven Whitehouse 10552ab9cd1cSSteven Whitehouse static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, 10562ab9cd1cSSteven Whitehouse const struct gfs2_inode *ip) 10572ab9cd1cSSteven Whitehouse { 10582ab9cd1cSSteven Whitehouse int error; 10592ab9cd1cSSteven Whitehouse 10602ab9cd1cSSteven Whitehouse if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) 10612ab9cd1cSSteven Whitehouse return -EPERM; 10622ab9cd1cSSteven Whitehouse 10632ab9cd1cSSteven Whitehouse if ((dip->i_inode.i_mode & S_ISVTX) && 10646b24c0d2SEric W. Biederman !uid_eq(dip->i_inode.i_uid, current_fsuid()) && 10656b24c0d2SEric W. Biederman !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER)) 10662ab9cd1cSSteven Whitehouse return -EPERM; 10672ab9cd1cSSteven Whitehouse 10682ab9cd1cSSteven Whitehouse if (IS_APPEND(&dip->i_inode)) 10692ab9cd1cSSteven Whitehouse return -EPERM; 10702ab9cd1cSSteven Whitehouse 1071549c7297SChristian Brauner error = gfs2_permission(&init_user_ns, &dip->i_inode, 1072549c7297SChristian Brauner MAY_WRITE | MAY_EXEC); 10732ab9cd1cSSteven Whitehouse if (error) 10742ab9cd1cSSteven Whitehouse return error; 10752ab9cd1cSSteven Whitehouse 107637975f15SFabian Frederick return gfs2_dir_check(&dip->i_inode, name, ip); 10772ab9cd1cSSteven Whitehouse } 10782ab9cd1cSSteven Whitehouse 10792ab9cd1cSSteven Whitehouse /** 10802ab9cd1cSSteven Whitehouse * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it 10812ab9cd1cSSteven Whitehouse * @dip: The parent directory 1082c551f66cSLee Jones * @dentry: The dentry to unlink 10832ab9cd1cSSteven Whitehouse * 10842ab9cd1cSSteven Whitehouse * Called with all the locks and in a transaction. This will only be 10852ab9cd1cSSteven Whitehouse * called for a directory after it has been checked to ensure it is empty. 10862ab9cd1cSSteven Whitehouse * 10872ab9cd1cSSteven Whitehouse * Returns: 0 on success, or an error 10882ab9cd1cSSteven Whitehouse */ 10892ab9cd1cSSteven Whitehouse 10902ab9cd1cSSteven Whitehouse static int gfs2_unlink_inode(struct gfs2_inode *dip, 10914327a9bfSBob Peterson const struct dentry *dentry) 10922ab9cd1cSSteven Whitehouse { 10932b0143b5SDavid Howells struct inode *inode = d_inode(dentry); 10942ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 10952ab9cd1cSSteven Whitehouse int error; 10962ab9cd1cSSteven Whitehouse 10972ab9cd1cSSteven Whitehouse error = gfs2_dir_del(dip, dentry); 10982ab9cd1cSSteven Whitehouse if (error) 10992ab9cd1cSSteven Whitehouse return error; 11002ab9cd1cSSteven Whitehouse 11012ab9cd1cSSteven Whitehouse ip->i_entries = 0; 1102078cd827SDeepa Dinamani inode->i_ctime = current_time(inode); 11032ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) 11042ab9cd1cSSteven Whitehouse clear_nlink(inode); 11052ab9cd1cSSteven Whitehouse else 11062ab9cd1cSSteven Whitehouse drop_nlink(inode); 11072ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 11082ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 11092ab9cd1cSSteven Whitehouse gfs2_unlink_di(inode); 11102ab9cd1cSSteven Whitehouse return 0; 11112ab9cd1cSSteven Whitehouse } 11122ab9cd1cSSteven Whitehouse 11132ab9cd1cSSteven Whitehouse 11142ab9cd1cSSteven Whitehouse /** 11152ab9cd1cSSteven Whitehouse * gfs2_unlink - Unlink an inode (this does rmdir as well) 11162ab9cd1cSSteven Whitehouse * @dir: The inode of the directory containing the inode to unlink 11172ab9cd1cSSteven Whitehouse * @dentry: The file itself 11182ab9cd1cSSteven Whitehouse * 11192ab9cd1cSSteven Whitehouse * This routine uses the type of the inode as a flag to figure out 11202ab9cd1cSSteven Whitehouse * whether this is an unlink or an rmdir. 11212ab9cd1cSSteven Whitehouse * 11222ab9cd1cSSteven Whitehouse * Returns: errno 11232ab9cd1cSSteven Whitehouse */ 11242ab9cd1cSSteven Whitehouse 11252ab9cd1cSSteven Whitehouse static int gfs2_unlink(struct inode *dir, struct dentry *dentry) 11262ab9cd1cSSteven Whitehouse { 11272ab9cd1cSSteven Whitehouse struct gfs2_inode *dip = GFS2_I(dir); 11282ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(dir); 11292b0143b5SDavid Howells struct inode *inode = d_inode(dentry); 11302ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 11312ab9cd1cSSteven Whitehouse struct gfs2_holder ghs[3]; 11322ab9cd1cSSteven Whitehouse struct gfs2_rgrpd *rgd; 11335e2f7d61SBob Peterson int error; 11345e2f7d61SBob Peterson 11355e2f7d61SBob Peterson error = gfs2_rindex_update(sdp); 11365e2f7d61SBob Peterson if (error) 11375e2f7d61SBob Peterson return error; 11385e2f7d61SBob Peterson 11395e2f7d61SBob Peterson error = -EROFS; 11402ab9cd1cSSteven Whitehouse 11412ab9cd1cSSteven Whitehouse gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs); 11422ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1); 11432ab9cd1cSSteven Whitehouse 114466fc061bSSteven Whitehouse rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1); 1145a365fbf3SSteven Whitehouse if (!rgd) 114687654896SSteven Whitehouse goto out_inodes; 1147a365fbf3SSteven Whitehouse 11484fc7ec31SBob Peterson gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, LM_FLAG_NODE_SCOPE, ghs + 2); 11492ab9cd1cSSteven Whitehouse 11502ab9cd1cSSteven Whitehouse 11512ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs); /* parent */ 11522ab9cd1cSSteven Whitehouse if (error) 11532ab9cd1cSSteven Whitehouse goto out_parent; 11542ab9cd1cSSteven Whitehouse 11552ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 1); /* child */ 11562ab9cd1cSSteven Whitehouse if (error) 11572ab9cd1cSSteven Whitehouse goto out_child; 11582ab9cd1cSSteven Whitehouse 11592ab9cd1cSSteven Whitehouse error = -ENOENT; 11602ab9cd1cSSteven Whitehouse if (inode->i_nlink == 0) 11612ab9cd1cSSteven Whitehouse goto out_rgrp; 11622ab9cd1cSSteven Whitehouse 11632ab9cd1cSSteven Whitehouse if (S_ISDIR(inode->i_mode)) { 11642ab9cd1cSSteven Whitehouse error = -ENOTEMPTY; 11652ab9cd1cSSteven Whitehouse if (ip->i_entries > 2 || inode->i_nlink > 2) 11662ab9cd1cSSteven Whitehouse goto out_rgrp; 11672ab9cd1cSSteven Whitehouse } 11682ab9cd1cSSteven Whitehouse 11692ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + 2); /* rgrp */ 11702ab9cd1cSSteven Whitehouse if (error) 11712ab9cd1cSSteven Whitehouse goto out_rgrp; 11722ab9cd1cSSteven Whitehouse 11732ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(dip, &dentry->d_name, ip); 11742ab9cd1cSSteven Whitehouse if (error) 11752ab9cd1cSSteven Whitehouse goto out_gunlock; 11762ab9cd1cSSteven Whitehouse 11772ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0); 11782ab9cd1cSSteven Whitehouse if (error) 11792eb5909dSBob Peterson goto out_gunlock; 11802ab9cd1cSSteven Whitehouse 11814327a9bfSBob Peterson error = gfs2_unlink_inode(dip, dentry); 11822ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 11832eb5909dSBob Peterson 11842ab9cd1cSSteven Whitehouse out_gunlock: 11852ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 2); 11862ab9cd1cSSteven Whitehouse out_rgrp: 11872ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + 1); 11882ab9cd1cSSteven Whitehouse out_child: 11892ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs); 11902ab9cd1cSSteven Whitehouse out_parent: 119187654896SSteven Whitehouse gfs2_holder_uninit(ghs + 2); 119287654896SSteven Whitehouse out_inodes: 119387654896SSteven Whitehouse gfs2_holder_uninit(ghs + 1); 11942ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs); 11952ab9cd1cSSteven Whitehouse return error; 11962ab9cd1cSSteven Whitehouse } 11972ab9cd1cSSteven Whitehouse 11982ab9cd1cSSteven Whitehouse /** 11992ab9cd1cSSteven Whitehouse * gfs2_symlink - Create a symlink 1200c551f66cSLee Jones * @mnt_userns: User namespace of the mount the inode was found from 12012ab9cd1cSSteven Whitehouse * @dir: The directory to create the symlink in 12022ab9cd1cSSteven Whitehouse * @dentry: The dentry to put the symlink in 12032ab9cd1cSSteven Whitehouse * @symname: The thing which the link points to 12042ab9cd1cSSteven Whitehouse * 12052ab9cd1cSSteven Whitehouse * Returns: errno 12062ab9cd1cSSteven Whitehouse */ 12072ab9cd1cSSteven Whitehouse 1208549c7297SChristian Brauner static int gfs2_symlink(struct user_namespace *mnt_userns, struct inode *dir, 1209549c7297SChristian Brauner struct dentry *dentry, const char *symname) 12102ab9cd1cSSteven Whitehouse { 1211160b4026SSteven Whitehouse unsigned int size; 12122ab9cd1cSSteven Whitehouse 12132ab9cd1cSSteven Whitehouse size = strlen(symname); 1214235628c5SAndreas Gruenbacher if (size >= gfs2_max_stuffed_size(GFS2_I(dir))) 12152ab9cd1cSSteven Whitehouse return -ENAMETOOLONG; 12162ab9cd1cSSteven Whitehouse 1217b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0); 12182ab9cd1cSSteven Whitehouse } 12192ab9cd1cSSteven Whitehouse 12202ab9cd1cSSteven Whitehouse /** 12212ab9cd1cSSteven Whitehouse * gfs2_mkdir - Make a directory 1222c551f66cSLee Jones * @mnt_userns: User namespace of the mount the inode was found from 12232ab9cd1cSSteven Whitehouse * @dir: The parent directory of the new one 12242ab9cd1cSSteven Whitehouse * @dentry: The dentry of the new directory 12252ab9cd1cSSteven Whitehouse * @mode: The mode of the new directory 12262ab9cd1cSSteven Whitehouse * 12272ab9cd1cSSteven Whitehouse * Returns: errno 12282ab9cd1cSSteven Whitehouse */ 12292ab9cd1cSSteven Whitehouse 1230549c7297SChristian Brauner static int gfs2_mkdir(struct user_namespace *mnt_userns, struct inode *dir, 1231549c7297SChristian Brauner struct dentry *dentry, umode_t mode) 12322ab9cd1cSSteven Whitehouse { 1233235628c5SAndreas Gruenbacher unsigned dsize = gfs2_max_stuffed_size(GFS2_I(dir)); 1234b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0); 12352ab9cd1cSSteven Whitehouse } 12362ab9cd1cSSteven Whitehouse 12372ab9cd1cSSteven Whitehouse /** 12382ab9cd1cSSteven Whitehouse * gfs2_mknod - Make a special file 1239c551f66cSLee Jones * @mnt_userns: User namespace of the mount the inode was found from 12402ab9cd1cSSteven Whitehouse * @dir: The directory in which the special file will reside 12412ab9cd1cSSteven Whitehouse * @dentry: The dentry of the special file 12422ab9cd1cSSteven Whitehouse * @mode: The mode of the special file 1243f2741d98SSteven Whitehouse * @dev: The device specification of the special file 12442ab9cd1cSSteven Whitehouse * 12452ab9cd1cSSteven Whitehouse */ 12462ab9cd1cSSteven Whitehouse 1247549c7297SChristian Brauner static int gfs2_mknod(struct user_namespace *mnt_userns, struct inode *dir, 1248549c7297SChristian Brauner struct dentry *dentry, umode_t mode, dev_t dev) 12492ab9cd1cSSteven Whitehouse { 1250b452a458SAl Viro return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0); 12516d4ade98SSteven Whitehouse } 12526d4ade98SSteven Whitehouse 12536d4ade98SSteven Whitehouse /** 12546d4ade98SSteven Whitehouse * gfs2_atomic_open - Atomically open a file 12556d4ade98SSteven Whitehouse * @dir: The directory 12566d4ade98SSteven Whitehouse * @dentry: The proposed new entry 12576d4ade98SSteven Whitehouse * @file: The proposed new struct file 12586d4ade98SSteven Whitehouse * @flags: open flags 12596d4ade98SSteven Whitehouse * @mode: File mode 12606d4ade98SSteven Whitehouse * 12616d4ade98SSteven Whitehouse * Returns: error code or 0 for success 12626d4ade98SSteven Whitehouse */ 12636d4ade98SSteven Whitehouse 12646d4ade98SSteven Whitehouse static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry, 12656d4ade98SSteven Whitehouse struct file *file, unsigned flags, 126644907d79SAl Viro umode_t mode) 12676d4ade98SSteven Whitehouse { 12686d4ade98SSteven Whitehouse struct dentry *d; 12696d4ade98SSteven Whitehouse bool excl = !!(flags & O_EXCL); 12706d4ade98SSteven Whitehouse 127100699ad8SAl Viro if (!d_in_lookup(dentry)) 12724d93bc3eSAl Viro goto skip_lookup; 12734d93bc3eSAl Viro 1274b452a458SAl Viro d = __gfs2_lookup(dir, dentry, file); 12756d4ade98SSteven Whitehouse if (IS_ERR(d)) 12766d4ade98SSteven Whitehouse return PTR_ERR(d); 12775ca1db41SMiklos Szeredi if (d != NULL) 12785ca1db41SMiklos Szeredi dentry = d; 12792b0143b5SDavid Howells if (d_really_is_positive(dentry)) { 1280aad888f8SAl Viro if (!(file->f_mode & FMODE_OPENED)) 1281ec7d879cSAl Viro return finish_no_open(file, d); 12825ca1db41SMiklos Szeredi dput(d); 128321039132SAl Viro return excl && (flags & O_CREAT) ? -EEXIST : 0; 12846d4ade98SSteven Whitehouse } 12856d4ade98SSteven Whitehouse 12865ca1db41SMiklos Szeredi BUG_ON(d != NULL); 12874d93bc3eSAl Viro 12884d93bc3eSAl Viro skip_lookup: 12896d4ade98SSteven Whitehouse if (!(flags & O_CREAT)) 12906d4ade98SSteven Whitehouse return -ENOENT; 12916d4ade98SSteven Whitehouse 1292b452a458SAl Viro return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl); 12932ab9cd1cSSteven Whitehouse } 12942ab9cd1cSSteven Whitehouse 12952ab9cd1cSSteven Whitehouse /* 12962ab9cd1cSSteven Whitehouse * gfs2_ok_to_move - check if it's ok to move a directory to another directory 12972ab9cd1cSSteven Whitehouse * @this: move this 12982ab9cd1cSSteven Whitehouse * @to: to here 12992ab9cd1cSSteven Whitehouse * 13002ab9cd1cSSteven Whitehouse * Follow @to back to the root and make sure we don't encounter @this 13012ab9cd1cSSteven Whitehouse * Assumes we already hold the rename lock. 13022ab9cd1cSSteven Whitehouse * 13032ab9cd1cSSteven Whitehouse * Returns: errno 13042ab9cd1cSSteven Whitehouse */ 13052ab9cd1cSSteven Whitehouse 13062ab9cd1cSSteven Whitehouse static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) 13072ab9cd1cSSteven Whitehouse { 13082ab9cd1cSSteven Whitehouse struct inode *dir = &to->i_inode; 13092ab9cd1cSSteven Whitehouse struct super_block *sb = dir->i_sb; 13102ab9cd1cSSteven Whitehouse struct inode *tmp; 13112ab9cd1cSSteven Whitehouse int error = 0; 13122ab9cd1cSSteven Whitehouse 13132ab9cd1cSSteven Whitehouse igrab(dir); 13142ab9cd1cSSteven Whitehouse 13152ab9cd1cSSteven Whitehouse for (;;) { 13162ab9cd1cSSteven Whitehouse if (dir == &this->i_inode) { 13172ab9cd1cSSteven Whitehouse error = -EINVAL; 13182ab9cd1cSSteven Whitehouse break; 13192ab9cd1cSSteven Whitehouse } 13202b0143b5SDavid Howells if (dir == d_inode(sb->s_root)) { 13212ab9cd1cSSteven Whitehouse error = 0; 13222ab9cd1cSSteven Whitehouse break; 13232ab9cd1cSSteven Whitehouse } 13242ab9cd1cSSteven Whitehouse 13252ab9cd1cSSteven Whitehouse tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1); 132648f8f711SAbhi Das if (!tmp) { 132748f8f711SAbhi Das error = -ENOENT; 132848f8f711SAbhi Das break; 132948f8f711SAbhi Das } 13302ab9cd1cSSteven Whitehouse if (IS_ERR(tmp)) { 13312ab9cd1cSSteven Whitehouse error = PTR_ERR(tmp); 13322ab9cd1cSSteven Whitehouse break; 13332ab9cd1cSSteven Whitehouse } 13342ab9cd1cSSteven Whitehouse 13352ab9cd1cSSteven Whitehouse iput(dir); 13362ab9cd1cSSteven Whitehouse dir = tmp; 13372ab9cd1cSSteven Whitehouse } 13382ab9cd1cSSteven Whitehouse 13392ab9cd1cSSteven Whitehouse iput(dir); 13402ab9cd1cSSteven Whitehouse 13412ab9cd1cSSteven Whitehouse return error; 13422ab9cd1cSSteven Whitehouse } 13432ab9cd1cSSteven Whitehouse 13442ab9cd1cSSteven Whitehouse /** 1345a63b7bbcSBenjamin Marzinski * update_moved_ino - Update an inode that's being moved 1346a63b7bbcSBenjamin Marzinski * @ip: The inode being moved 1347a63b7bbcSBenjamin Marzinski * @ndip: The parent directory of the new filename 1348a63b7bbcSBenjamin Marzinski * @dir_rename: True of ip is a directory 1349a63b7bbcSBenjamin Marzinski * 1350a63b7bbcSBenjamin Marzinski * Returns: errno 1351a63b7bbcSBenjamin Marzinski */ 1352a63b7bbcSBenjamin Marzinski 1353a63b7bbcSBenjamin Marzinski static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip, 1354a63b7bbcSBenjamin Marzinski int dir_rename) 1355a63b7bbcSBenjamin Marzinski { 1356a63b7bbcSBenjamin Marzinski if (dir_rename) 1357a63b7bbcSBenjamin Marzinski return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR); 1358a63b7bbcSBenjamin Marzinski 1359078cd827SDeepa Dinamani ip->i_inode.i_ctime = current_time(&ip->i_inode); 136083998ccdSAndreas Gruenbacher mark_inode_dirty_sync(&ip->i_inode); 1361a63b7bbcSBenjamin Marzinski return 0; 1362a63b7bbcSBenjamin Marzinski } 1363a63b7bbcSBenjamin Marzinski 1364a63b7bbcSBenjamin Marzinski 1365a63b7bbcSBenjamin Marzinski /** 13662ab9cd1cSSteven Whitehouse * gfs2_rename - Rename a file 13672ab9cd1cSSteven Whitehouse * @odir: Parent directory of old file name 13682ab9cd1cSSteven Whitehouse * @odentry: The old dentry of the file 13692ab9cd1cSSteven Whitehouse * @ndir: Parent directory of new file name 13702ab9cd1cSSteven Whitehouse * @ndentry: The new dentry of the file 13712ab9cd1cSSteven Whitehouse * 13722ab9cd1cSSteven Whitehouse * Returns: errno 13732ab9cd1cSSteven Whitehouse */ 13742ab9cd1cSSteven Whitehouse 13752ab9cd1cSSteven Whitehouse static int gfs2_rename(struct inode *odir, struct dentry *odentry, 13762ab9cd1cSSteven Whitehouse struct inode *ndir, struct dentry *ndentry) 13772ab9cd1cSSteven Whitehouse { 13782ab9cd1cSSteven Whitehouse struct gfs2_inode *odip = GFS2_I(odir); 13792ab9cd1cSSteven Whitehouse struct gfs2_inode *ndip = GFS2_I(ndir); 13802b0143b5SDavid Howells struct gfs2_inode *ip = GFS2_I(d_inode(odentry)); 13812ab9cd1cSSteven Whitehouse struct gfs2_inode *nip = NULL; 13822ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(odir); 1383bc74aaefSBob Peterson struct gfs2_holder ghs[4], r_gh, rd_gh; 13842ab9cd1cSSteven Whitehouse struct gfs2_rgrpd *nrgd; 13852ab9cd1cSSteven Whitehouse unsigned int num_gh; 13862ab9cd1cSSteven Whitehouse int dir_rename = 0; 138719aeb5a6SBob Peterson struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, }; 13882ab9cd1cSSteven Whitehouse unsigned int x; 13892ab9cd1cSSteven Whitehouse int error; 13902ab9cd1cSSteven Whitehouse 13916df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&r_gh); 1392bc74aaefSBob Peterson gfs2_holder_mark_uninitialized(&rd_gh); 13932b0143b5SDavid Howells if (d_really_is_positive(ndentry)) { 13942b0143b5SDavid Howells nip = GFS2_I(d_inode(ndentry)); 13952ab9cd1cSSteven Whitehouse if (ip == nip) 13962ab9cd1cSSteven Whitehouse return 0; 13972ab9cd1cSSteven Whitehouse } 13982ab9cd1cSSteven Whitehouse 13995e2f7d61SBob Peterson error = gfs2_rindex_update(sdp); 14005e2f7d61SBob Peterson if (error) 14015e2f7d61SBob Peterson return error; 14025e2f7d61SBob Peterson 14032fba46a0SBob Peterson error = gfs2_qa_get(ndip); 14040a305e49SBob Peterson if (error) 14050a305e49SBob Peterson return error; 14060a305e49SBob Peterson 14072ab9cd1cSSteven Whitehouse if (odip != ndip) { 14082ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 14092ab9cd1cSSteven Whitehouse 0, &r_gh); 14102ab9cd1cSSteven Whitehouse if (error) 14112ab9cd1cSSteven Whitehouse goto out; 14122ab9cd1cSSteven Whitehouse 14132ab9cd1cSSteven Whitehouse if (S_ISDIR(ip->i_inode.i_mode)) { 14142ab9cd1cSSteven Whitehouse dir_rename = 1; 1415a63b7bbcSBenjamin Marzinski /* don't move a directory into its subdir */ 14162ab9cd1cSSteven Whitehouse error = gfs2_ok_to_move(ip, ndip); 14172ab9cd1cSSteven Whitehouse if (error) 14182ab9cd1cSSteven Whitehouse goto out_gunlock_r; 14192ab9cd1cSSteven Whitehouse } 14202ab9cd1cSSteven Whitehouse } 14212ab9cd1cSSteven Whitehouse 14222ab9cd1cSSteven Whitehouse num_gh = 1; 1423ad26967bSBob Peterson gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs); 14242ab9cd1cSSteven Whitehouse if (odip != ndip) { 1425ad26967bSBob Peterson gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE,GL_ASYNC, 1426ad26967bSBob Peterson ghs + num_gh); 14272ab9cd1cSSteven Whitehouse num_gh++; 14282ab9cd1cSSteven Whitehouse } 1429ad26967bSBob Peterson gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); 14302ab9cd1cSSteven Whitehouse num_gh++; 14312ab9cd1cSSteven Whitehouse 14322ab9cd1cSSteven Whitehouse if (nip) { 1433ad26967bSBob Peterson gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, 1434ad26967bSBob Peterson ghs + num_gh); 14352ab9cd1cSSteven Whitehouse num_gh++; 14362ab9cd1cSSteven Whitehouse } 14372ab9cd1cSSteven Whitehouse 14382ab9cd1cSSteven Whitehouse for (x = 0; x < num_gh; x++) { 14392ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(ghs + x); 14402ab9cd1cSSteven Whitehouse if (error) 14412ab9cd1cSSteven Whitehouse goto out_gunlock; 14422ab9cd1cSSteven Whitehouse } 1443ad26967bSBob Peterson error = gfs2_glock_async_wait(num_gh, ghs); 1444ad26967bSBob Peterson if (error) 1445ad26967bSBob Peterson goto out_gunlock; 14462ab9cd1cSSteven Whitehouse 1447bc74aaefSBob Peterson if (nip) { 1448bc74aaefSBob Peterson /* Grab the resource group glock for unlink flag twiddling. 1449bc74aaefSBob Peterson * This is the case where the target dinode already exists 1450bc74aaefSBob Peterson * so we unlink before doing the rename. 1451bc74aaefSBob Peterson */ 1452bc74aaefSBob Peterson nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1); 1453bc74aaefSBob Peterson if (!nrgd) { 1454bc74aaefSBob Peterson error = -ENOENT; 1455bc74aaefSBob Peterson goto out_gunlock; 1456bc74aaefSBob Peterson } 14574fc7ec31SBob Peterson error = gfs2_glock_nq_init(nrgd->rd_gl, LM_ST_EXCLUSIVE, 14584fc7ec31SBob Peterson LM_FLAG_NODE_SCOPE, &rd_gh); 1459bc74aaefSBob Peterson if (error) 1460bc74aaefSBob Peterson goto out_gunlock; 1461bc74aaefSBob Peterson } 1462bc74aaefSBob Peterson 14632ab9cd1cSSteven Whitehouse error = -ENOENT; 14642ab9cd1cSSteven Whitehouse if (ip->i_inode.i_nlink == 0) 14652ab9cd1cSSteven Whitehouse goto out_gunlock; 14662ab9cd1cSSteven Whitehouse 14672ab9cd1cSSteven Whitehouse /* Check out the old directory */ 14682ab9cd1cSSteven Whitehouse 14692ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(odip, &odentry->d_name, ip); 14702ab9cd1cSSteven Whitehouse if (error) 14712ab9cd1cSSteven Whitehouse goto out_gunlock; 14722ab9cd1cSSteven Whitehouse 14732ab9cd1cSSteven Whitehouse /* Check out the new directory */ 14742ab9cd1cSSteven Whitehouse 14752ab9cd1cSSteven Whitehouse if (nip) { 14762ab9cd1cSSteven Whitehouse error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 14772ab9cd1cSSteven Whitehouse if (error) 14782ab9cd1cSSteven Whitehouse goto out_gunlock; 14792ab9cd1cSSteven Whitehouse 14802ab9cd1cSSteven Whitehouse if (nip->i_inode.i_nlink == 0) { 14812ab9cd1cSSteven Whitehouse error = -EAGAIN; 14822ab9cd1cSSteven Whitehouse goto out_gunlock; 14832ab9cd1cSSteven Whitehouse } 14842ab9cd1cSSteven Whitehouse 14852ab9cd1cSSteven Whitehouse if (S_ISDIR(nip->i_inode.i_mode)) { 14862ab9cd1cSSteven Whitehouse if (nip->i_entries < 2) { 14872ab9cd1cSSteven Whitehouse gfs2_consist_inode(nip); 14882ab9cd1cSSteven Whitehouse error = -EIO; 14892ab9cd1cSSteven Whitehouse goto out_gunlock; 14902ab9cd1cSSteven Whitehouse } 14912ab9cd1cSSteven Whitehouse if (nip->i_entries > 2) { 14922ab9cd1cSSteven Whitehouse error = -ENOTEMPTY; 14932ab9cd1cSSteven Whitehouse goto out_gunlock; 14942ab9cd1cSSteven Whitehouse } 14952ab9cd1cSSteven Whitehouse } 14962ab9cd1cSSteven Whitehouse } else { 1497549c7297SChristian Brauner error = gfs2_permission(&init_user_ns, ndir, 1498549c7297SChristian Brauner MAY_WRITE | MAY_EXEC); 14992ab9cd1cSSteven Whitehouse if (error) 15002ab9cd1cSSteven Whitehouse goto out_gunlock; 15012ab9cd1cSSteven Whitehouse 15022ab9cd1cSSteven Whitehouse error = gfs2_dir_check(ndir, &ndentry->d_name, NULL); 15032ab9cd1cSSteven Whitehouse switch (error) { 15042ab9cd1cSSteven Whitehouse case -ENOENT: 15052ab9cd1cSSteven Whitehouse error = 0; 15062ab9cd1cSSteven Whitehouse break; 15072ab9cd1cSSteven Whitehouse case 0: 15082ab9cd1cSSteven Whitehouse error = -EEXIST; 1509e5966cf2SGustavo A. R. Silva goto out_gunlock; 15102ab9cd1cSSteven Whitehouse default: 15112ab9cd1cSSteven Whitehouse goto out_gunlock; 1512098b9c14SAliasgar Surti } 15132ab9cd1cSSteven Whitehouse 15142ab9cd1cSSteven Whitehouse if (odip != ndip) { 15152ab9cd1cSSteven Whitehouse if (!ndip->i_inode.i_nlink) { 15162ab9cd1cSSteven Whitehouse error = -ENOENT; 15172ab9cd1cSSteven Whitehouse goto out_gunlock; 15182ab9cd1cSSteven Whitehouse } 15192ab9cd1cSSteven Whitehouse if (ndip->i_entries == (u32)-1) { 15202ab9cd1cSSteven Whitehouse error = -EFBIG; 15212ab9cd1cSSteven Whitehouse goto out_gunlock; 15222ab9cd1cSSteven Whitehouse } 15232ab9cd1cSSteven Whitehouse if (S_ISDIR(ip->i_inode.i_mode) && 15242ab9cd1cSSteven Whitehouse ndip->i_inode.i_nlink == (u32)-1) { 15252ab9cd1cSSteven Whitehouse error = -EMLINK; 15262ab9cd1cSSteven Whitehouse goto out_gunlock; 15272ab9cd1cSSteven Whitehouse } 15282ab9cd1cSSteven Whitehouse } 15292ab9cd1cSSteven Whitehouse } 15302ab9cd1cSSteven Whitehouse 15312ab9cd1cSSteven Whitehouse /* Check out the dir to be renamed */ 15322ab9cd1cSSteven Whitehouse 15332ab9cd1cSSteven Whitehouse if (dir_rename) { 1534549c7297SChristian Brauner error = gfs2_permission(&init_user_ns, d_inode(odentry), 1535549c7297SChristian Brauner MAY_WRITE); 15362ab9cd1cSSteven Whitehouse if (error) 15372ab9cd1cSSteven Whitehouse goto out_gunlock; 15382ab9cd1cSSteven Whitehouse } 15392ab9cd1cSSteven Whitehouse 15403c1c0ae1SSteven Whitehouse if (nip == NULL) { 15413c1c0ae1SSteven Whitehouse error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da); 15423c1c0ae1SSteven Whitehouse if (error) 15432ab9cd1cSSteven Whitehouse goto out_gunlock; 15443c1c0ae1SSteven Whitehouse } 15452ab9cd1cSSteven Whitehouse 15463c1c0ae1SSteven Whitehouse if (da.nr_blocks) { 15473c1c0ae1SSteven Whitehouse struct gfs2_alloc_parms ap = { .target = da.nr_blocks, }; 1548b8fbf471SAbhi Das error = gfs2_quota_lock_check(ndip, &ap); 15492ab9cd1cSSteven Whitehouse if (error) 15505407e242SBob Peterson goto out_gunlock; 15512ab9cd1cSSteven Whitehouse 15527b9cff46SSteven Whitehouse error = gfs2_inplace_reserve(ndip, &ap); 15532ab9cd1cSSteven Whitehouse if (error) 15542ab9cd1cSSteven Whitehouse goto out_gunlock_q; 15552ab9cd1cSSteven Whitehouse 1556534cf9caSSteven Whitehouse error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) + 1557534cf9caSSteven Whitehouse 4 * RES_LEAF + 4, 0); 15582ab9cd1cSSteven Whitehouse if (error) 15592ab9cd1cSSteven Whitehouse goto out_ipreserv; 15602ab9cd1cSSteven Whitehouse } else { 15612ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 15622ab9cd1cSSteven Whitehouse 5 * RES_LEAF + 4, 0); 15632ab9cd1cSSteven Whitehouse if (error) 15642ab9cd1cSSteven Whitehouse goto out_gunlock; 15652ab9cd1cSSteven Whitehouse } 15662ab9cd1cSSteven Whitehouse 15672ab9cd1cSSteven Whitehouse /* Remove the target file, if it exists */ 15682ab9cd1cSSteven Whitehouse 15694327a9bfSBob Peterson if (nip) 15704327a9bfSBob Peterson error = gfs2_unlink_inode(ndip, ndentry); 15712ab9cd1cSSteven Whitehouse 1572a63b7bbcSBenjamin Marzinski error = update_moved_ino(ip, ndip, dir_rename); 15732ab9cd1cSSteven Whitehouse if (error) 15742ab9cd1cSSteven Whitehouse goto out_end_trans; 15752ab9cd1cSSteven Whitehouse 15762ab9cd1cSSteven Whitehouse error = gfs2_dir_del(odip, odentry); 15772ab9cd1cSSteven Whitehouse if (error) 15782ab9cd1cSSteven Whitehouse goto out_end_trans; 15792ab9cd1cSSteven Whitehouse 15802b47dad8SSteven Whitehouse error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da); 15812ab9cd1cSSteven Whitehouse if (error) 15822ab9cd1cSSteven Whitehouse goto out_end_trans; 15832ab9cd1cSSteven Whitehouse 15842ab9cd1cSSteven Whitehouse out_end_trans: 15852ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 15862ab9cd1cSSteven Whitehouse out_ipreserv: 15873c1c0ae1SSteven Whitehouse if (da.nr_blocks) 15882ab9cd1cSSteven Whitehouse gfs2_inplace_release(ndip); 15892ab9cd1cSSteven Whitehouse out_gunlock_q: 15903c1c0ae1SSteven Whitehouse if (da.nr_blocks) 15912ab9cd1cSSteven Whitehouse gfs2_quota_unlock(ndip); 15922ab9cd1cSSteven Whitehouse out_gunlock: 15932b47dad8SSteven Whitehouse gfs2_dir_no_add(&da); 1594bc74aaefSBob Peterson if (gfs2_holder_initialized(&rd_gh)) 1595bc74aaefSBob Peterson gfs2_glock_dq_uninit(&rd_gh); 1596bc74aaefSBob Peterson 15972ab9cd1cSSteven Whitehouse while (x--) { 1598ad26967bSBob Peterson if (gfs2_holder_queued(ghs + x)) 15992ab9cd1cSSteven Whitehouse gfs2_glock_dq(ghs + x); 16002ab9cd1cSSteven Whitehouse gfs2_holder_uninit(ghs + x); 16012ab9cd1cSSteven Whitehouse } 16022ab9cd1cSSteven Whitehouse out_gunlock_r: 16036df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&r_gh)) 16042ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&r_gh); 16052ab9cd1cSSteven Whitehouse out: 16062fba46a0SBob Peterson gfs2_qa_put(ndip); 16072ab9cd1cSSteven Whitehouse return error; 16082ab9cd1cSSteven Whitehouse } 16092ab9cd1cSSteven Whitehouse 16102ab9cd1cSSteven Whitehouse /** 1611a63b7bbcSBenjamin Marzinski * gfs2_exchange - exchange two files 1612a63b7bbcSBenjamin Marzinski * @odir: Parent directory of old file name 1613a63b7bbcSBenjamin Marzinski * @odentry: The old dentry of the file 1614a63b7bbcSBenjamin Marzinski * @ndir: Parent directory of new file name 1615a63b7bbcSBenjamin Marzinski * @ndentry: The new dentry of the file 1616a63b7bbcSBenjamin Marzinski * @flags: The rename flags 1617a63b7bbcSBenjamin Marzinski * 1618a63b7bbcSBenjamin Marzinski * Returns: errno 1619a63b7bbcSBenjamin Marzinski */ 1620a63b7bbcSBenjamin Marzinski 1621a63b7bbcSBenjamin Marzinski static int gfs2_exchange(struct inode *odir, struct dentry *odentry, 1622a63b7bbcSBenjamin Marzinski struct inode *ndir, struct dentry *ndentry, 1623a63b7bbcSBenjamin Marzinski unsigned int flags) 1624a63b7bbcSBenjamin Marzinski { 1625a63b7bbcSBenjamin Marzinski struct gfs2_inode *odip = GFS2_I(odir); 1626a63b7bbcSBenjamin Marzinski struct gfs2_inode *ndip = GFS2_I(ndir); 1627a63b7bbcSBenjamin Marzinski struct gfs2_inode *oip = GFS2_I(odentry->d_inode); 1628a63b7bbcSBenjamin Marzinski struct gfs2_inode *nip = GFS2_I(ndentry->d_inode); 1629a63b7bbcSBenjamin Marzinski struct gfs2_sbd *sdp = GFS2_SB(odir); 1630ad26967bSBob Peterson struct gfs2_holder ghs[4], r_gh; 1631a63b7bbcSBenjamin Marzinski unsigned int num_gh; 1632a63b7bbcSBenjamin Marzinski unsigned int x; 1633a63b7bbcSBenjamin Marzinski umode_t old_mode = oip->i_inode.i_mode; 1634a63b7bbcSBenjamin Marzinski umode_t new_mode = nip->i_inode.i_mode; 1635a63b7bbcSBenjamin Marzinski int error; 1636a63b7bbcSBenjamin Marzinski 16376df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&r_gh); 1638a63b7bbcSBenjamin Marzinski error = gfs2_rindex_update(sdp); 1639a63b7bbcSBenjamin Marzinski if (error) 1640a63b7bbcSBenjamin Marzinski return error; 1641a63b7bbcSBenjamin Marzinski 1642a63b7bbcSBenjamin Marzinski if (odip != ndip) { 1643a63b7bbcSBenjamin Marzinski error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE, 1644a63b7bbcSBenjamin Marzinski 0, &r_gh); 1645a63b7bbcSBenjamin Marzinski if (error) 1646a63b7bbcSBenjamin Marzinski goto out; 1647a63b7bbcSBenjamin Marzinski 1648a63b7bbcSBenjamin Marzinski if (S_ISDIR(old_mode)) { 1649a63b7bbcSBenjamin Marzinski /* don't move a directory into its subdir */ 1650a63b7bbcSBenjamin Marzinski error = gfs2_ok_to_move(oip, ndip); 1651a63b7bbcSBenjamin Marzinski if (error) 1652a63b7bbcSBenjamin Marzinski goto out_gunlock_r; 1653a63b7bbcSBenjamin Marzinski } 1654a63b7bbcSBenjamin Marzinski 1655a63b7bbcSBenjamin Marzinski if (S_ISDIR(new_mode)) { 1656a63b7bbcSBenjamin Marzinski /* don't move a directory into its subdir */ 1657a63b7bbcSBenjamin Marzinski error = gfs2_ok_to_move(nip, odip); 1658a63b7bbcSBenjamin Marzinski if (error) 1659a63b7bbcSBenjamin Marzinski goto out_gunlock_r; 1660a63b7bbcSBenjamin Marzinski } 1661a63b7bbcSBenjamin Marzinski } 1662a63b7bbcSBenjamin Marzinski 1663a63b7bbcSBenjamin Marzinski num_gh = 1; 1664ad26967bSBob Peterson gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs); 1665a63b7bbcSBenjamin Marzinski if (odip != ndip) { 1666ad26967bSBob Peterson gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, 1667ad26967bSBob Peterson ghs + num_gh); 1668a63b7bbcSBenjamin Marzinski num_gh++; 1669a63b7bbcSBenjamin Marzinski } 1670ad26967bSBob Peterson gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); 1671a63b7bbcSBenjamin Marzinski num_gh++; 1672a63b7bbcSBenjamin Marzinski 1673ad26967bSBob Peterson gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh); 1674a63b7bbcSBenjamin Marzinski num_gh++; 1675a63b7bbcSBenjamin Marzinski 1676a63b7bbcSBenjamin Marzinski for (x = 0; x < num_gh; x++) { 1677a63b7bbcSBenjamin Marzinski error = gfs2_glock_nq(ghs + x); 1678a63b7bbcSBenjamin Marzinski if (error) 1679a63b7bbcSBenjamin Marzinski goto out_gunlock; 1680a63b7bbcSBenjamin Marzinski } 1681a63b7bbcSBenjamin Marzinski 1682ad26967bSBob Peterson error = gfs2_glock_async_wait(num_gh, ghs); 1683ad26967bSBob Peterson if (error) 1684ad26967bSBob Peterson goto out_gunlock; 1685ad26967bSBob Peterson 1686a63b7bbcSBenjamin Marzinski error = -ENOENT; 1687a63b7bbcSBenjamin Marzinski if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0) 1688a63b7bbcSBenjamin Marzinski goto out_gunlock; 1689a63b7bbcSBenjamin Marzinski 1690a63b7bbcSBenjamin Marzinski error = gfs2_unlink_ok(odip, &odentry->d_name, oip); 1691a63b7bbcSBenjamin Marzinski if (error) 1692a63b7bbcSBenjamin Marzinski goto out_gunlock; 1693a63b7bbcSBenjamin Marzinski error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip); 1694a63b7bbcSBenjamin Marzinski if (error) 1695a63b7bbcSBenjamin Marzinski goto out_gunlock; 1696a63b7bbcSBenjamin Marzinski 1697a63b7bbcSBenjamin Marzinski if (S_ISDIR(old_mode)) { 1698549c7297SChristian Brauner error = gfs2_permission(&init_user_ns, odentry->d_inode, 1699549c7297SChristian Brauner MAY_WRITE); 1700a63b7bbcSBenjamin Marzinski if (error) 1701a63b7bbcSBenjamin Marzinski goto out_gunlock; 1702a63b7bbcSBenjamin Marzinski } 1703a63b7bbcSBenjamin Marzinski if (S_ISDIR(new_mode)) { 1704549c7297SChristian Brauner error = gfs2_permission(&init_user_ns, ndentry->d_inode, 1705549c7297SChristian Brauner MAY_WRITE); 1706a63b7bbcSBenjamin Marzinski if (error) 1707a63b7bbcSBenjamin Marzinski goto out_gunlock; 1708a63b7bbcSBenjamin Marzinski } 1709a63b7bbcSBenjamin Marzinski error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0); 1710a63b7bbcSBenjamin Marzinski if (error) 1711a63b7bbcSBenjamin Marzinski goto out_gunlock; 1712a63b7bbcSBenjamin Marzinski 1713a63b7bbcSBenjamin Marzinski error = update_moved_ino(oip, ndip, S_ISDIR(old_mode)); 1714a63b7bbcSBenjamin Marzinski if (error) 1715a63b7bbcSBenjamin Marzinski goto out_end_trans; 1716a63b7bbcSBenjamin Marzinski 1717a63b7bbcSBenjamin Marzinski error = update_moved_ino(nip, odip, S_ISDIR(new_mode)); 1718a63b7bbcSBenjamin Marzinski if (error) 1719a63b7bbcSBenjamin Marzinski goto out_end_trans; 1720a63b7bbcSBenjamin Marzinski 1721a63b7bbcSBenjamin Marzinski error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip, 1722a63b7bbcSBenjamin Marzinski IF2DT(old_mode)); 1723a63b7bbcSBenjamin Marzinski if (error) 1724a63b7bbcSBenjamin Marzinski goto out_end_trans; 1725a63b7bbcSBenjamin Marzinski 1726a63b7bbcSBenjamin Marzinski error = gfs2_dir_mvino(odip, &odentry->d_name, nip, 1727a63b7bbcSBenjamin Marzinski IF2DT(new_mode)); 1728a63b7bbcSBenjamin Marzinski if (error) 1729a63b7bbcSBenjamin Marzinski goto out_end_trans; 1730a63b7bbcSBenjamin Marzinski 1731a63b7bbcSBenjamin Marzinski if (odip != ndip) { 1732a63b7bbcSBenjamin Marzinski if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) { 1733a63b7bbcSBenjamin Marzinski inc_nlink(&odip->i_inode); 1734a63b7bbcSBenjamin Marzinski drop_nlink(&ndip->i_inode); 1735a63b7bbcSBenjamin Marzinski } else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) { 1736a63b7bbcSBenjamin Marzinski inc_nlink(&ndip->i_inode); 1737a63b7bbcSBenjamin Marzinski drop_nlink(&odip->i_inode); 1738a63b7bbcSBenjamin Marzinski } 1739a63b7bbcSBenjamin Marzinski } 1740a63b7bbcSBenjamin Marzinski mark_inode_dirty(&ndip->i_inode); 1741a63b7bbcSBenjamin Marzinski if (odip != ndip) 1742a63b7bbcSBenjamin Marzinski mark_inode_dirty(&odip->i_inode); 1743a63b7bbcSBenjamin Marzinski 1744a63b7bbcSBenjamin Marzinski out_end_trans: 1745a63b7bbcSBenjamin Marzinski gfs2_trans_end(sdp); 1746a63b7bbcSBenjamin Marzinski out_gunlock: 1747a63b7bbcSBenjamin Marzinski while (x--) { 1748ad26967bSBob Peterson if (gfs2_holder_queued(ghs + x)) 1749a63b7bbcSBenjamin Marzinski gfs2_glock_dq(ghs + x); 1750a63b7bbcSBenjamin Marzinski gfs2_holder_uninit(ghs + x); 1751a63b7bbcSBenjamin Marzinski } 1752a63b7bbcSBenjamin Marzinski out_gunlock_r: 17536df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&r_gh)) 1754a63b7bbcSBenjamin Marzinski gfs2_glock_dq_uninit(&r_gh); 1755a63b7bbcSBenjamin Marzinski out: 1756a63b7bbcSBenjamin Marzinski return error; 1757a63b7bbcSBenjamin Marzinski } 1758a63b7bbcSBenjamin Marzinski 1759549c7297SChristian Brauner static int gfs2_rename2(struct user_namespace *mnt_userns, struct inode *odir, 1760549c7297SChristian Brauner struct dentry *odentry, struct inode *ndir, 1761549c7297SChristian Brauner struct dentry *ndentry, unsigned int flags) 1762a63b7bbcSBenjamin Marzinski { 1763a63b7bbcSBenjamin Marzinski flags &= ~RENAME_NOREPLACE; 1764a63b7bbcSBenjamin Marzinski 1765a63b7bbcSBenjamin Marzinski if (flags & ~RENAME_EXCHANGE) 1766a63b7bbcSBenjamin Marzinski return -EINVAL; 1767a63b7bbcSBenjamin Marzinski 1768a63b7bbcSBenjamin Marzinski if (flags & RENAME_EXCHANGE) 1769a63b7bbcSBenjamin Marzinski return gfs2_exchange(odir, odentry, ndir, ndentry, flags); 1770a63b7bbcSBenjamin Marzinski 1771a63b7bbcSBenjamin Marzinski return gfs2_rename(odir, odentry, ndir, ndentry); 1772a63b7bbcSBenjamin Marzinski } 1773a63b7bbcSBenjamin Marzinski 1774a63b7bbcSBenjamin Marzinski /** 17756b255391SAl Viro * gfs2_get_link - Follow a symbolic link 17762ab9cd1cSSteven Whitehouse * @dentry: The dentry of the link 17776b255391SAl Viro * @inode: The inode of the link 1778fceef393SAl Viro * @done: destructor for return value 17792ab9cd1cSSteven Whitehouse * 17802ab9cd1cSSteven Whitehouse * This can handle symlinks of any size. 17812ab9cd1cSSteven Whitehouse * 17822ab9cd1cSSteven Whitehouse * Returns: 0 on success or error code 17832ab9cd1cSSteven Whitehouse */ 17842ab9cd1cSSteven Whitehouse 17856b255391SAl Viro static const char *gfs2_get_link(struct dentry *dentry, 1786fceef393SAl Viro struct inode *inode, 1787fceef393SAl Viro struct delayed_call *done) 17882ab9cd1cSSteven Whitehouse { 17896b255391SAl Viro struct gfs2_inode *ip = GFS2_I(inode); 17902ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 17912ab9cd1cSSteven Whitehouse struct buffer_head *dibh; 1792160b4026SSteven Whitehouse unsigned int size; 17932ab9cd1cSSteven Whitehouse char *buf; 17942ab9cd1cSSteven Whitehouse int error; 17952ab9cd1cSSteven Whitehouse 17966b255391SAl Viro if (!dentry) 17976b255391SAl Viro return ERR_PTR(-ECHILD); 17986b255391SAl Viro 17992ab9cd1cSSteven Whitehouse gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh); 18002ab9cd1cSSteven Whitehouse error = gfs2_glock_nq(&i_gh); 18012ab9cd1cSSteven Whitehouse if (error) { 18022ab9cd1cSSteven Whitehouse gfs2_holder_uninit(&i_gh); 1803680baacbSAl Viro return ERR_PTR(error); 18042ab9cd1cSSteven Whitehouse } 18052ab9cd1cSSteven Whitehouse 18062ab9cd1cSSteven Whitehouse size = (unsigned int)i_size_read(&ip->i_inode); 18072ab9cd1cSSteven Whitehouse if (size == 0) { 18082ab9cd1cSSteven Whitehouse gfs2_consist_inode(ip); 18092ab9cd1cSSteven Whitehouse buf = ERR_PTR(-EIO); 18102ab9cd1cSSteven Whitehouse goto out; 18112ab9cd1cSSteven Whitehouse } 18122ab9cd1cSSteven Whitehouse 18132ab9cd1cSSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 18142ab9cd1cSSteven Whitehouse if (error) { 18152ab9cd1cSSteven Whitehouse buf = ERR_PTR(error); 18162ab9cd1cSSteven Whitehouse goto out; 18172ab9cd1cSSteven Whitehouse } 18182ab9cd1cSSteven Whitehouse 1819160b4026SSteven Whitehouse buf = kzalloc(size + 1, GFP_NOFS); 18202ab9cd1cSSteven Whitehouse if (!buf) 18212ab9cd1cSSteven Whitehouse buf = ERR_PTR(-ENOMEM); 18222ab9cd1cSSteven Whitehouse else 1823160b4026SSteven Whitehouse memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size); 18242ab9cd1cSSteven Whitehouse brelse(dibh); 18252ab9cd1cSSteven Whitehouse out: 18262ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 1827680baacbSAl Viro if (!IS_ERR(buf)) 1828fceef393SAl Viro set_delayed_call(done, kfree_link, buf); 1829680baacbSAl Viro return buf; 18302ab9cd1cSSteven Whitehouse } 18312ab9cd1cSSteven Whitehouse 18322ab9cd1cSSteven Whitehouse /** 1833c551f66cSLee Jones * gfs2_permission 1834c551f66cSLee Jones * @mnt_userns: User namespace of the mount the inode was found from 18352ab9cd1cSSteven Whitehouse * @inode: The inode 18362ab9cd1cSSteven Whitehouse * @mask: The mask to be tested 18372ab9cd1cSSteven Whitehouse * 18382ab9cd1cSSteven Whitehouse * This may be called from the VFS directly, or from within GFS2 with the 18392ab9cd1cSSteven Whitehouse * inode locked, so we look to see if the glock is already locked and only 18402ab9cd1cSSteven Whitehouse * lock the glock if its not already been done. 18412ab9cd1cSSteven Whitehouse * 18422ab9cd1cSSteven Whitehouse * Returns: errno 18432ab9cd1cSSteven Whitehouse */ 18442ab9cd1cSSteven Whitehouse 1845549c7297SChristian Brauner int gfs2_permission(struct user_namespace *mnt_userns, struct inode *inode, 1846549c7297SChristian Brauner int mask) 18472ab9cd1cSSteven Whitehouse { 18482ab9cd1cSSteven Whitehouse struct gfs2_inode *ip; 18492ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 18502ab9cd1cSSteven Whitehouse int error; 18512ab9cd1cSSteven Whitehouse 18526df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&i_gh); 18532ab9cd1cSSteven Whitehouse ip = GFS2_I(inode); 18542ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 185510556cb2SAl Viro if (mask & MAY_NOT_BLOCK) 18562ab9cd1cSSteven Whitehouse return -ECHILD; 18572ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); 18582ab9cd1cSSteven Whitehouse if (error) 18592ab9cd1cSSteven Whitehouse return error; 18602ab9cd1cSSteven Whitehouse } 18612ab9cd1cSSteven Whitehouse 18622ab9cd1cSSteven Whitehouse if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode)) 1863337684a1SEryu Guan error = -EPERM; 18642ab9cd1cSSteven Whitehouse else 186547291baaSChristian Brauner error = generic_permission(&init_user_ns, inode, mask); 18666df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&i_gh)) 18672ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 18682ab9cd1cSSteven Whitehouse 18692ab9cd1cSSteven Whitehouse return error; 18702ab9cd1cSSteven Whitehouse } 18712ab9cd1cSSteven Whitehouse 1872ab9bbda0SSteven Whitehouse static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 18732ab9cd1cSSteven Whitehouse { 18742f221d6fSChristian Brauner setattr_copy(&init_user_ns, inode, attr); 18752ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 18762ab9cd1cSSteven Whitehouse return 0; 18772ab9cd1cSSteven Whitehouse } 18782ab9cd1cSSteven Whitehouse 1879a4122a95SAndreas Gruenbacher static int gfs2_setattr_simple(struct inode *inode, struct iattr *attr) 18802ab9cd1cSSteven Whitehouse { 18812ab9cd1cSSteven Whitehouse int error; 18822ab9cd1cSSteven Whitehouse 18832ab9cd1cSSteven Whitehouse if (current->journal_info) 1884ab9bbda0SSteven Whitehouse return __gfs2_setattr_simple(inode, attr); 18852ab9cd1cSSteven Whitehouse 1886ab9bbda0SSteven Whitehouse error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0); 18872ab9cd1cSSteven Whitehouse if (error) 18882ab9cd1cSSteven Whitehouse return error; 18892ab9cd1cSSteven Whitehouse 1890ab9bbda0SSteven Whitehouse error = __gfs2_setattr_simple(inode, attr); 1891ab9bbda0SSteven Whitehouse gfs2_trans_end(GFS2_SB(inode)); 18922ab9cd1cSSteven Whitehouse return error; 18932ab9cd1cSSteven Whitehouse } 18942ab9cd1cSSteven Whitehouse 18952ab9cd1cSSteven Whitehouse static int setattr_chown(struct inode *inode, struct iattr *attr) 18962ab9cd1cSSteven Whitehouse { 18972ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 18982ab9cd1cSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 18997c06b5d6SEric W. Biederman kuid_t ouid, nuid; 19007c06b5d6SEric W. Biederman kgid_t ogid, ngid; 19012ab9cd1cSSteven Whitehouse int error; 1902b8fbf471SAbhi Das struct gfs2_alloc_parms ap; 19032ab9cd1cSSteven Whitehouse 19042ab9cd1cSSteven Whitehouse ouid = inode->i_uid; 19052ab9cd1cSSteven Whitehouse ogid = inode->i_gid; 19062ab9cd1cSSteven Whitehouse nuid = attr->ia_uid; 19072ab9cd1cSSteven Whitehouse ngid = attr->ia_gid; 19082ab9cd1cSSteven Whitehouse 19096b24c0d2SEric W. Biederman if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid)) 1910f4108a60SEric W. Biederman ouid = nuid = NO_UID_QUOTA_CHANGE; 19116b24c0d2SEric W. Biederman if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid)) 1912f4108a60SEric W. Biederman ogid = ngid = NO_GID_QUOTA_CHANGE; 19132fba46a0SBob Peterson error = gfs2_qa_get(ip); 191462e96cf8SBob Peterson if (error) 19152fba46a0SBob Peterson return error; 191662e96cf8SBob Peterson 191762e96cf8SBob Peterson error = gfs2_rindex_update(sdp); 191862e96cf8SBob Peterson if (error) 191962e96cf8SBob Peterson goto out; 192062e96cf8SBob Peterson 192162e96cf8SBob Peterson error = gfs2_quota_lock(ip, nuid, ngid); 192262e96cf8SBob Peterson if (error) 192362e96cf8SBob Peterson goto out; 192462e96cf8SBob Peterson 1925b8fbf471SAbhi Das ap.target = gfs2_get_inode_blocks(&ip->i_inode); 1926b8fbf471SAbhi Das 19276b24c0d2SEric W. Biederman if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 19286b24c0d2SEric W. Biederman !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 1929b8fbf471SAbhi Das error = gfs2_quota_check(ip, nuid, ngid, &ap); 19302ab9cd1cSSteven Whitehouse if (error) 19312ab9cd1cSSteven Whitehouse goto out_gunlock_q; 19322ab9cd1cSSteven Whitehouse } 19332ab9cd1cSSteven Whitehouse 19342ab9cd1cSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0); 19352ab9cd1cSSteven Whitehouse if (error) 19362ab9cd1cSSteven Whitehouse goto out_gunlock_q; 19372ab9cd1cSSteven Whitehouse 1938ab9bbda0SSteven Whitehouse error = gfs2_setattr_simple(inode, attr); 19392ab9cd1cSSteven Whitehouse if (error) 19402ab9cd1cSSteven Whitehouse goto out_end_trans; 19412ab9cd1cSSteven Whitehouse 19426b24c0d2SEric W. Biederman if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) || 19436b24c0d2SEric W. Biederman !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) { 194439a72580SAbhi Das gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid); 1945b8fbf471SAbhi Das gfs2_quota_change(ip, ap.target, nuid, ngid); 19462ab9cd1cSSteven Whitehouse } 19472ab9cd1cSSteven Whitehouse 19482ab9cd1cSSteven Whitehouse out_end_trans: 19492ab9cd1cSSteven Whitehouse gfs2_trans_end(sdp); 19502ab9cd1cSSteven Whitehouse out_gunlock_q: 19512ab9cd1cSSteven Whitehouse gfs2_quota_unlock(ip); 195262e96cf8SBob Peterson out: 19532fba46a0SBob Peterson gfs2_qa_put(ip); 19542ab9cd1cSSteven Whitehouse return error; 19552ab9cd1cSSteven Whitehouse } 19562ab9cd1cSSteven Whitehouse 19572ab9cd1cSSteven Whitehouse /** 19582ab9cd1cSSteven Whitehouse * gfs2_setattr - Change attributes on an inode 1959c551f66cSLee Jones * @mnt_userns: User namespace of the mount the inode was found from 19602ab9cd1cSSteven Whitehouse * @dentry: The dentry which is changing 19612ab9cd1cSSteven Whitehouse * @attr: The structure describing the change 19622ab9cd1cSSteven Whitehouse * 19632ab9cd1cSSteven Whitehouse * The VFS layer wants to change one or more of an inodes attributes. Write 19642ab9cd1cSSteven Whitehouse * that change out to disk. 19652ab9cd1cSSteven Whitehouse * 19662ab9cd1cSSteven Whitehouse * Returns: errno 19672ab9cd1cSSteven Whitehouse */ 19682ab9cd1cSSteven Whitehouse 1969549c7297SChristian Brauner static int gfs2_setattr(struct user_namespace *mnt_userns, 1970549c7297SChristian Brauner struct dentry *dentry, struct iattr *attr) 19712ab9cd1cSSteven Whitehouse { 19722b0143b5SDavid Howells struct inode *inode = d_inode(dentry); 19732ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 19742ab9cd1cSSteven Whitehouse struct gfs2_holder i_gh; 19752ab9cd1cSSteven Whitehouse int error; 19762ab9cd1cSSteven Whitehouse 19772fba46a0SBob Peterson error = gfs2_qa_get(ip); 19780a305e49SBob Peterson if (error) 19790a305e49SBob Peterson return error; 19800a305e49SBob Peterson 19812ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh); 19822ab9cd1cSSteven Whitehouse if (error) 19832fba46a0SBob Peterson goto out; 19842ab9cd1cSSteven Whitehouse 1985d75b9fa0SAndreas Gruenbacher error = may_setattr(&init_user_ns, inode, attr->ia_valid); 1986d75b9fa0SAndreas Gruenbacher if (error) 19872fba46a0SBob Peterson goto error; 19882ab9cd1cSSteven Whitehouse 19892f221d6fSChristian Brauner error = setattr_prepare(&init_user_ns, dentry, attr); 19902ab9cd1cSSteven Whitehouse if (error) 19912fba46a0SBob Peterson goto error; 19922ab9cd1cSSteven Whitehouse 19932ab9cd1cSSteven Whitehouse if (attr->ia_valid & ATTR_SIZE) 19942ab9cd1cSSteven Whitehouse error = gfs2_setattr_size(inode, attr->ia_size); 19952ab9cd1cSSteven Whitehouse else if (attr->ia_valid & (ATTR_UID | ATTR_GID)) 19962ab9cd1cSSteven Whitehouse error = setattr_chown(inode, attr); 1997e01580bfSChristoph Hellwig else { 1998ab9bbda0SSteven Whitehouse error = gfs2_setattr_simple(inode, attr); 1999e01580bfSChristoph Hellwig if (!error && attr->ia_valid & ATTR_MODE) 2000138060baSChristian Brauner error = posix_acl_chmod(&init_user_ns, dentry, 2001e65ce2a5SChristian Brauner inode->i_mode); 2002e01580bfSChristoph Hellwig } 20032ab9cd1cSSteven Whitehouse 20042fba46a0SBob Peterson error: 20052ab9cd1cSSteven Whitehouse if (!error) 20062ab9cd1cSSteven Whitehouse mark_inode_dirty(inode); 2007ab9bbda0SSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 20082fba46a0SBob Peterson out: 20092fba46a0SBob Peterson gfs2_qa_put(ip); 20102ab9cd1cSSteven Whitehouse return error; 20112ab9cd1cSSteven Whitehouse } 20122ab9cd1cSSteven Whitehouse 20132ab9cd1cSSteven Whitehouse /** 20142ab9cd1cSSteven Whitehouse * gfs2_getattr - Read out an inode's attributes 2015549c7297SChristian Brauner * @mnt_userns: user namespace of the mount the inode was found from 2016a528d35eSDavid Howells * @path: Object to query 20172ab9cd1cSSteven Whitehouse * @stat: The inode's stats 2018a528d35eSDavid Howells * @request_mask: Mask of STATX_xxx flags indicating the caller's interests 2019a528d35eSDavid Howells * @flags: AT_STATX_xxx setting 20202ab9cd1cSSteven Whitehouse * 20212ab9cd1cSSteven Whitehouse * This may be called from the VFS directly, or from within GFS2 with the 20222ab9cd1cSSteven Whitehouse * inode locked, so we look to see if the glock is already locked and only 20232ab9cd1cSSteven Whitehouse * lock the glock if its not already been done. Note that its the NFS 20242ab9cd1cSSteven Whitehouse * readdirplus operation which causes this to be called (from filldir) 20252ab9cd1cSSteven Whitehouse * with the glock already held. 20262ab9cd1cSSteven Whitehouse * 20272ab9cd1cSSteven Whitehouse * Returns: errno 20282ab9cd1cSSteven Whitehouse */ 20292ab9cd1cSSteven Whitehouse 2030549c7297SChristian Brauner static int gfs2_getattr(struct user_namespace *mnt_userns, 2031549c7297SChristian Brauner const struct path *path, struct kstat *stat, 2032a528d35eSDavid Howells u32 request_mask, unsigned int flags) 20332ab9cd1cSSteven Whitehouse { 2034a528d35eSDavid Howells struct inode *inode = d_inode(path->dentry); 20352ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 20362ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 2037b2623c2fSAndreas Gruenbacher u32 gfsflags; 20382ab9cd1cSSteven Whitehouse int error; 20392ab9cd1cSSteven Whitehouse 20406df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&gh); 20412ab9cd1cSSteven Whitehouse if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) { 20422ab9cd1cSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh); 20432ab9cd1cSSteven Whitehouse if (error) 20442ab9cd1cSSteven Whitehouse return error; 20452ab9cd1cSSteven Whitehouse } 20462ab9cd1cSSteven Whitehouse 2047b2623c2fSAndreas Gruenbacher gfsflags = ip->i_diskflags; 2048b2623c2fSAndreas Gruenbacher if (gfsflags & GFS2_DIF_APPENDONLY) 2049b2623c2fSAndreas Gruenbacher stat->attributes |= STATX_ATTR_APPEND; 2050b2623c2fSAndreas Gruenbacher if (gfsflags & GFS2_DIF_IMMUTABLE) 2051b2623c2fSAndreas Gruenbacher stat->attributes |= STATX_ATTR_IMMUTABLE; 2052b2623c2fSAndreas Gruenbacher 2053b2623c2fSAndreas Gruenbacher stat->attributes_mask |= (STATX_ATTR_APPEND | 2054b2623c2fSAndreas Gruenbacher STATX_ATTR_COMPRESSED | 2055b2623c2fSAndreas Gruenbacher STATX_ATTR_ENCRYPTED | 2056b2623c2fSAndreas Gruenbacher STATX_ATTR_IMMUTABLE | 2057b2623c2fSAndreas Gruenbacher STATX_ATTR_NODUMP); 2058b2623c2fSAndreas Gruenbacher 20590d56a451SChristian Brauner generic_fillattr(&init_user_ns, inode, stat); 2060b2623c2fSAndreas Gruenbacher 20616df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&gh)) 20622ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 20632ab9cd1cSSteven Whitehouse 20642ab9cd1cSSteven Whitehouse return 0; 20652ab9cd1cSSteven Whitehouse } 20662ab9cd1cSSteven Whitehouse 20672ab9cd1cSSteven Whitehouse static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 20682ab9cd1cSSteven Whitehouse u64 start, u64 len) 20692ab9cd1cSSteven Whitehouse { 20702ab9cd1cSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 20712ab9cd1cSSteven Whitehouse struct gfs2_holder gh; 20722ab9cd1cSSteven Whitehouse int ret; 20732ab9cd1cSSteven Whitehouse 2074aac1a55bSBob Peterson inode_lock_shared(inode); 20752ab9cd1cSSteven Whitehouse 20762ab9cd1cSSteven Whitehouse ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 20772ab9cd1cSSteven Whitehouse if (ret) 20782ab9cd1cSSteven Whitehouse goto out; 20792ab9cd1cSSteven Whitehouse 2080aac1a55bSBob Peterson ret = iomap_fiemap(inode, fieinfo, start, len, &gfs2_iomap_ops); 20812ab9cd1cSSteven Whitehouse 20822ab9cd1cSSteven Whitehouse gfs2_glock_dq_uninit(&gh); 2083aac1a55bSBob Peterson 20842ab9cd1cSSteven Whitehouse out: 2085aac1a55bSBob Peterson inode_unlock_shared(inode); 20862ab9cd1cSSteven Whitehouse return ret; 20872ab9cd1cSSteven Whitehouse } 20882ab9cd1cSSteven Whitehouse 20893a27411cSAndreas Gruenbacher loff_t gfs2_seek_data(struct file *file, loff_t offset) 20903a27411cSAndreas Gruenbacher { 20913a27411cSAndreas Gruenbacher struct inode *inode = file->f_mapping->host; 20923a27411cSAndreas Gruenbacher struct gfs2_inode *ip = GFS2_I(inode); 20933a27411cSAndreas Gruenbacher struct gfs2_holder gh; 20943a27411cSAndreas Gruenbacher loff_t ret; 20953a27411cSAndreas Gruenbacher 20963a27411cSAndreas Gruenbacher inode_lock_shared(inode); 20973a27411cSAndreas Gruenbacher ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 20983a27411cSAndreas Gruenbacher if (!ret) 20993a27411cSAndreas Gruenbacher ret = iomap_seek_data(inode, offset, &gfs2_iomap_ops); 21003a27411cSAndreas Gruenbacher gfs2_glock_dq_uninit(&gh); 21013a27411cSAndreas Gruenbacher inode_unlock_shared(inode); 21023a27411cSAndreas Gruenbacher 21033a27411cSAndreas Gruenbacher if (ret < 0) 21043a27411cSAndreas Gruenbacher return ret; 21053a27411cSAndreas Gruenbacher return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); 21063a27411cSAndreas Gruenbacher } 21073a27411cSAndreas Gruenbacher 21083a27411cSAndreas Gruenbacher loff_t gfs2_seek_hole(struct file *file, loff_t offset) 21093a27411cSAndreas Gruenbacher { 21103a27411cSAndreas Gruenbacher struct inode *inode = file->f_mapping->host; 21113a27411cSAndreas Gruenbacher struct gfs2_inode *ip = GFS2_I(inode); 21123a27411cSAndreas Gruenbacher struct gfs2_holder gh; 21133a27411cSAndreas Gruenbacher loff_t ret; 21143a27411cSAndreas Gruenbacher 21153a27411cSAndreas Gruenbacher inode_lock_shared(inode); 21163a27411cSAndreas Gruenbacher ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh); 21173a27411cSAndreas Gruenbacher if (!ret) 21183a27411cSAndreas Gruenbacher ret = iomap_seek_hole(inode, offset, &gfs2_iomap_ops); 21193a27411cSAndreas Gruenbacher gfs2_glock_dq_uninit(&gh); 21203a27411cSAndreas Gruenbacher inode_unlock_shared(inode); 21213a27411cSAndreas Gruenbacher 21223a27411cSAndreas Gruenbacher if (ret < 0) 21233a27411cSAndreas Gruenbacher return ret; 21243a27411cSAndreas Gruenbacher return vfs_setpos(file, ret, inode->i_sb->s_maxbytes); 21253a27411cSAndreas Gruenbacher } 21263a27411cSAndreas Gruenbacher 212782e938bdSAndreas Gruenbacher static int gfs2_update_time(struct inode *inode, struct timespec64 *time, 212882e938bdSAndreas Gruenbacher int flags) 212982e938bdSAndreas Gruenbacher { 213082e938bdSAndreas Gruenbacher struct gfs2_inode *ip = GFS2_I(inode); 213182e938bdSAndreas Gruenbacher struct gfs2_glock *gl = ip->i_gl; 213282e938bdSAndreas Gruenbacher struct gfs2_holder *gh; 213382e938bdSAndreas Gruenbacher int error; 213482e938bdSAndreas Gruenbacher 213582e938bdSAndreas Gruenbacher gh = gfs2_glock_is_locked_by_me(gl); 213682e938bdSAndreas Gruenbacher if (gh && !gfs2_glock_is_held_excl(gl)) { 213782e938bdSAndreas Gruenbacher gfs2_glock_dq(gh); 213882e938bdSAndreas Gruenbacher gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, gh); 213982e938bdSAndreas Gruenbacher error = gfs2_glock_nq(gh); 214082e938bdSAndreas Gruenbacher if (error) 214182e938bdSAndreas Gruenbacher return error; 214282e938bdSAndreas Gruenbacher } 214382e938bdSAndreas Gruenbacher return generic_update_time(inode, time, flags); 214482e938bdSAndreas Gruenbacher } 214582e938bdSAndreas Gruenbacher 2146e3a77eebSAndreas Gruenbacher static const struct inode_operations gfs2_file_iops = { 21472ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 21482ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 21492ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 21502ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 21512ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 2152*cac2f8b8SChristian Brauner .get_inode_acl = gfs2_get_acl, 2153e01580bfSChristoph Hellwig .set_acl = gfs2_set_acl, 215482e938bdSAndreas Gruenbacher .update_time = gfs2_update_time, 215588b631cbSMiklos Szeredi .fileattr_get = gfs2_fileattr_get, 215688b631cbSMiklos Szeredi .fileattr_set = gfs2_fileattr_set, 21572ab9cd1cSSteven Whitehouse }; 21582ab9cd1cSSteven Whitehouse 2159e3a77eebSAndreas Gruenbacher static const struct inode_operations gfs2_dir_iops = { 21602ab9cd1cSSteven Whitehouse .create = gfs2_create, 21612ab9cd1cSSteven Whitehouse .lookup = gfs2_lookup, 21622ab9cd1cSSteven Whitehouse .link = gfs2_link, 21632ab9cd1cSSteven Whitehouse .unlink = gfs2_unlink, 21642ab9cd1cSSteven Whitehouse .symlink = gfs2_symlink, 21652ab9cd1cSSteven Whitehouse .mkdir = gfs2_mkdir, 21662ab9cd1cSSteven Whitehouse .rmdir = gfs2_unlink, 21672ab9cd1cSSteven Whitehouse .mknod = gfs2_mknod, 21682773bf00SMiklos Szeredi .rename = gfs2_rename2, 21692ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 21702ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 21712ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 21722ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 21732ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 2174*cac2f8b8SChristian Brauner .get_inode_acl = gfs2_get_acl, 2175e01580bfSChristoph Hellwig .set_acl = gfs2_set_acl, 217682e938bdSAndreas Gruenbacher .update_time = gfs2_update_time, 21776d4ade98SSteven Whitehouse .atomic_open = gfs2_atomic_open, 217888b631cbSMiklos Szeredi .fileattr_get = gfs2_fileattr_get, 217988b631cbSMiklos Szeredi .fileattr_set = gfs2_fileattr_set, 21802ab9cd1cSSteven Whitehouse }; 21812ab9cd1cSSteven Whitehouse 2182e3a77eebSAndreas Gruenbacher static const struct inode_operations gfs2_symlink_iops = { 21836b255391SAl Viro .get_link = gfs2_get_link, 21842ab9cd1cSSteven Whitehouse .permission = gfs2_permission, 21852ab9cd1cSSteven Whitehouse .setattr = gfs2_setattr, 21862ab9cd1cSSteven Whitehouse .getattr = gfs2_getattr, 21872ab9cd1cSSteven Whitehouse .listxattr = gfs2_listxattr, 21882ab9cd1cSSteven Whitehouse .fiemap = gfs2_fiemap, 21892ab9cd1cSSteven Whitehouse }; 21902ab9cd1cSSteven Whitehouse 2191